sentences: a waxing gibbous is a kind of phase of the moon
docs: half_moon is phase_of_moon. phase_of_moon is time_period. pisang_wax is wax. phase_of_moon is phase. floor_wax is wax. phase is appearance. moon has phases full_moon is phase_of_moon. mooning is making_obscene_gestures. new_moon is phase_of_moon.