What are the keywords in the following sentence? festival was one of the special events of the homecoming weekend .
event, festival, weekend

What are the keywords in the following sentence? spacecraft manufacturer says this robot could assist astronauts on a deep space mission .
assist, manufacturer, mission, robot, say

What are the keywords in the following sentence? sunset over rural field with dramatic clouds in the sky and busy road time lapse
cloud, field, sky, sunset

What are the keywords in the following sentence? An empty classroom showing lined up desks, the clock and chalkboards.
chalkboard, classroom, clock, desk