Assertion: mayfly's lifespan | /r/HasProperty | year
Facets:
Source sentences:
text: Although the full lifespan of a mayfly can be years, the adult stage is brief.
text: The average lifespan of house mouse is one year.
text: Their entire lifespan is several years, but most of this time is spent as larvae.
text: Because the lifespan of a mantis is only about a year, people who want to keep mantises often breed them.