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.

Passage: Mice handled with the home cage tunnel spent a much greater proportion of the test interacting with the handler (mean ± s.e.m., 39.8 ± 5.2 percent time of 60 s test, n = 8 cages) than those handled by tail (6.4 ± 2.0 percent time, n = 8 cages)