From the table above, certain things can be concluded. Step by step, from the information extracted, most of the songs authorship correspond to Lennon and McCartney, which were clearly the main influences in terms of composing in the Beatles golden decade. With respect to the average number of words used per song, Harrison was the one that wrote shorter songs. However, when we compute which percentage of the total words used was unique, Harrison has the highest value. Meaning that although writing shorter songs he had slightly a higher lexical vocabulary. We must keep in mind that this analysis is performed without considering stop words, which makes all these percentages higher. In terms of average length per word used, results show that it is almost the same in all writers, being to a small extent Lennon alone the one that wrote shorter words.

The most interesting part comes when analyzing the sentimental analysis for each writer. According to both labMT and VADER, Lennon and McCartney together were the ones that wrote more positive songs. In contrast, when writing alone their songs were more pessimistic and unenthusiastic. However, what seems clear is that if Lennon and McCartney join forces to write a song together: honey pie.

Average Sentimental Analysis has been useful to observe the differences in the general mood between the different Beatles writers. However, we still missing a lot of information of which were the main concerns each year that were reflected in their lyrics.

This graph above is a good tool to complement the LabMT and VADER graphs seen before. Now, we can get an idea of which is the mood for year by looking at the most used words. Moreover, a LabMT filtering has been included, so when moving around the different points of the graph you can observe also the average LabMT value of all the songs containing that word at that specific year.

If we start at 1962 we observe how "love" is the most used word. This also happens at 1964 and 1969. However, the average LabMT value just goes over 6 at this first year. Less positive about love or simply more songs that decrease the mean? Some special graphs analyzing the most common words used can be seen at the end of Sentimental Analysis main page.

Now, continuing with the graph above, at 1963 Beatles release their first studio album Please Please Me, with songs such as "Love Me Do", "P.S. I Love You" or the famous cover of "Twist and Shout" (Phil Medley, Bert Russell). It is interesting that this year the word yeah is the most used one, followed by love and ill, with LabMT average values lower than 1962. Just when the Beatles decided to include the word "wanna" in their songs during this year, that their positivity significantly increased.

In 1964 Beatles released both "The Beatles' Second Album" and "A Hard Day's Night", among other singles. Songs like "Long Tall Sally", "And I Love Her" and "A Hard Day's Night" are from this year. We can observe that love is the most used word this year, with an insane number of 118 times. Yes, 118 times love was used in the songs released at 1964. Word "know" stands pretty close behind with a total number of 105. From the average values, we can see that Beatles perspective regarding love has increased its positivity during this year. In contrast, ill is still in the 5 most common used ones, and surprisingly the songs that include the word "yeah" reach a LabMT average value of 4.93. The lowest one in the scatter plot above. It seems clear that 1964 was a year of contrasts.

We could continue the analysis year by year, but now that you got an idea of how this graph should be interpreted it is time for you to play a little and extract your own conclusions. Just a small analysis to end. At 1969 apart from the already common ones "love" and "know", the third to five most common words used are "want", "get", "back". In 1970 the most common one is "home", with "mine" and "way" also among the most common ones. Were the Beatles unintentionally (or not) trying to express their desire to get back to the past years in their song and their willing to separate paths and take their own way home?

However, maybe an analysis with VADER makes more sense, due to the mood of the songs usually resides in how the sentence is written and not just in single words. So same procedure has been done but now computing the average sentimental value of each song according to VADER criteria. Due to a lot of neutral sentences were observed, two different graphs have been made. First one, considering all song sentences (more robust) and second one just considering these sentences that differ from neutral mood. These are the results obtained:

Here, the concept is similar as before, but this time just the most common word per writer per year is plotted. Thus, if just one writer has wrote songs during a specific year, just one dot appears. This is the first case, in 1962, where word love was the most used one by Lennon/McCartney. 1963 is more interesting. Whereas Lennon/McCartney lead the ranking again with the word "yeah", the most common used per McCartney is "ooh", while for Lennon is "mmm". Just when Harrison is the writer, the most common word used for itself have more sense. Maybe they should have let him write more? But if we take a look at which it is, we see it is "bother". If we go to the dictionary we see that the first definition for bother is: take the trouble to do something. Was Harrison trying to tell them "please don't bother me with this thing of writing songs, just let me be the lead guitarist and talk with music". The truth however, is that Harrison grew as a composer during the second half of Beatles career. But at that point their individual differences had become more apparent, and many of his song ideas were rejected by Lennon and McCartney. While this was partly indicative of the increased competition for space on album sides, with three songwriters in the band, Harrison's frustration fostered in him a sense of alienation from the Beatles. Just a look at 1970, word "mine" was the most used one by Harrisson.

Apart from that, 1964, seems to be the "love" year, at least for McCartney, due to is the most common word used for both writing with Lennon or just himself. 1966 seems a year of innovation, due to it is the one with more uncommon words between the most used ones, words such as "doctor" or "taxman" are between the most used ones. From that year on, McCartney most used words were "need", "say", "life", "love" and "home", whereas Lennon ones were "wake", "come" and "want" two years in a row. It is said that from 1966 their individual differences were increasing, and while McCartney maintained a deep interest in pop musical trends, Lennon's compositions became more introspective and experimental. It is true that although this mainly refers to music, this differences can also be sensed from the differences in their lyrics.