('CID100000303', 1),cholicacid
('CID100094203', 1),Cholicacid, methyl ester (6CI,7CI,8CI)
ldiff: defaultdict(<type 'list'>, {'CID100000303': [0], 'CID100094203': [28]})
f1: [0]
f2: [28]
c1: Counter({0: 1})
c2: Counter({28: 1})
The chosen was ... CID100000303