('CID116130295', 3),Aprotinin
('CID116130295', 3), Aprotinin
('CID116130295', 3),APROTININ
('CID100003649', 3),APROTININ
('CID100003649', 3),Aprotinine
('CID100003649', 3),Aprotinine [INN-French]
ldiff: defaultdict(<type 'list'>, {'CID116130295': [0, 1, 0], 'CID100003649': [0, 1, 14]})
f1: [0, 1, 0]
f2: [0, 1, 14]
c1: Counter({0: 2, 1: 1})
c2: Counter({0: 1, 1: 1, 14: 1})
The chosen was ... CID116130295