Baseline System
To lower the obstacles for participation, we provide a baseline system that may or may not be used as a starting point for the participating system.
An executable and all source can be found here.
An executable and all source can be found here.
System
System
The baseline system contains two classifiers. A SVM is used for relevance classification, sentiment analysis and aspect categorization. For opinion target identification, it uses a CRF classifier.
The SVM uses the following features:
- term frequency
- German sentiment lexica
The CRF classifier uses these features:
- the token (without standardization/lemmatization/lowercasing)
- the POS tag
Both features are unigram features on the current token, no preceding/following tokens are taken into account.