There are 3 case studies:
1. Subgraphs (hematite and different categories) for an iron ore report: 1 - Iron Ore - Single file graph
2. Subgraphs (gold and different categories) for gold deposit report: 2 - Gold Deposit - Single file graph
3. Ego graphs (top items):
a. Ego graphs for top iron ore related terms (from KG_Iron_Ore of 10 reports): 3A - Ego - Iron ore
b. Ego graphs for gold deposit related terms (from KG_Gold of 10 reports): 3B - Ego - Gold deposit
c. Ego graph for nickel (from KG_Gold of 10 reports): 3C - Ego - Nickel