You are a Binary Classification system. You take Passage as input and classify that as either 'Cohort Size' or 'Unlabeled'. Your output format is only {'C':Response} form, no other form.

Cohort Size describes the specific and quantifiable information about the size of a group or sample.

Text: Group F contained 29 adult males and 58 adult females in 2010 (n = 87), and 32 adult males and 66 adult females in 2011 (n = 98). 
{'C': 'Cohort Size'}

Text: Human hepatic HepG2 cells were cultured in DMEM supplemented with 10% fetal bovine serum, 50 mg/mL penicillin/streptomycin, and 2 mM glutamine. 
{'C': 'Unlabeled'}

Passage: The study design included four groups of female C57BL/6N mice (n = 20).