cluster.py: K-means cluster
similar_subset.py: find similar node pairs with or without subset, has three modes: node merging, node and neighbor merging, neighbor merging.
similar_percentage.py: filter out nodes based on ratio.
merge_node.py: merge similar nodes
merge.py: merge nodes with summarization on descriptions.
winrate.py: load answer files to compute the overall winrate after swapping file places.
