Assertion: puberty | /r/CapableOf | begin with the onset of a substance
Facets:
value: always
type: TEMPORAL
Source sentences:
text: While puberty begins and ends at different times for different individuals, usually beginning around the age of 10, though it may start as early as age 9 or as late as age 12, puberty always begins with the onset of a substance called gonadotropin-releasing hormone (GnRH) in the male's body.