Assertion: dolphin | /r/HasProperty | well-known
Facets:
value: for their amazingly complex social structure
type: CAUSE
value: for language
type: CAUSE
value: for their playful nature
type: OTHER
Source sentences:
text: Dolphins are well-known for their playful nature and also demonstrate teaching-skills, innovation, joy, and grief.
text: In fact dolphins are well-known for their amazingly complex social structure and language.