Assertion: shark's lifespan | /r/HasProperty | 20 years
Facets:
Source sentences:
text: Lifespan: 20 years
text: This marine animal has the lifespan up to 20 years.
text: The Spiny Dogfish Shark can live more than 100 years; this is exceptional when you consider that the average lifespan of most species is 20 years.