What are the keywords in the following sentence? A train maintenance vehicle sits on train tracks.
sit, track, vehicle

What are the keywords in the following sentence? beads and bangles for sale in a market
bead, market, sale

What are the keywords in the following sentence? football player was named man of the match in the final
match, name, player

What are the keywords in the following sentence? playful couple chasing in the sea during summer day .
couple, day, sea