What are the keywords in the following sentence? politician plays the piano at a gala dinner for membership organisation ministerial meeting .
meeting, piano, politician

What are the keywords in the following sentence? Three parallel railroad tracks split into six separate tracks with a train on one of them.
split, track, train

What are the keywords in the following sentence? roof terrace with hammock on a sunny day
day, roof, terrace

What are the keywords in the following sentence? passenger airplane few moments before landing on runway at the airport
airplane, airport, land, runway