Assertion: piranha | /r/HasProperty | well-known
Facets:
value: for its nocturnal behavior
type: CAUSE
Source sentences:
text: Known for their grouping instincts, the piranha is also well-known for its nocturnal behavior; hunting for food between dusk and dawn.
text: However, it is known for one thing, the much fabled frenzy that strips mammals to the bone.