('CID110782980', 2),metanitrophenyl-alpha-d-galactoside
('CID110782980', 2),METANITROPHENYL-ALPHA-D-GALACTOSIDE
('CID100004085', 1),metanitrophenyl-alpha-d-galactoside
ldiff: defaultdict(<type 'list'>, {'CID100004085': [0], 'CID110782980': [0, 0]})
f1: [0, 0]
f2: [0]
c1: Counter({0: 2})
c2: Counter({0: 1})
The chosen was ... CID110782980