Assertion: puberty's body | /r/CapableOf | begin making sperm
Facets:
value: at puberty
type: TEMPORAL
Source sentences:
text: At puberty, a boy's body begins making sperm, and he starts to be able to ejaculate, which is semen coming out from his penis when he is sexually excited.
text: Once these tubules are formed and the infrastructure is in place, the body begins producing sperm.
text: During puberty, a boy's body also begins making sperm.