Assertion: helicopter | /r/HasProperty | a type of rotorcraft
Facets:
Source sentences:
text: A helicopter, sometimes referred to in slang as a "chopper" or "helo" (United States military usage, pronounced with a long "e"), is a type of rotorcraft in which lift and thrust are supplied by horizontally-spinning rotors.
text: A helicopter, sometimes referred to in slang as a "chopper", is a type of rotorcraft in which lift and thrust are supplied by one or more horizontally-spinning rotors.