What are the keywords in the following sentence? 10 people in a pool who are participating in synchronized swimming.
participate, swimming, synchronize

What are the keywords in the following sentence? time lapse footage with pan left motion of the sun streaking through window of ruin
motion, pan, ruin, streak, sun

What are the keywords in the following sentence? Two men are serving cookies and sweets on plates.
cookie, plate, serve

What are the keywords in the following sentence? A train with steam coming out is on the tracks.
come, steam, track, train