Assertion: sperm | /r/CapableOf | swim to the top
Facets:
value: at the bottom
type: LOCATION
Source sentences:
text: After about half-an-hour, the lighter sperm, containing the male chromosome pair (XY), will have swum to the top, leaving the heavier sperm, containing the female chromosome pair (XX), at the bottom, thus allowing selection and storage according to sex.