Assertion: porpoise | /r/HasProperty | cetacean
Facets:
Source sentences:
text: Dolphins and porpoises are cetaceans — marine mammals
text: Dolphins, porpoises, and whales are all mammals called cetaceans, which is from the Greek word meaning “sea monster.
text: Let’s start with what they have in common: both dolphins and porpoises are cetaceans, an order of marine mammal that also includes whales.