What are the keywords in the following sentence? event held every year attracts visitors from all around the world .
attract, event, visitor

What are the keywords in the following sentence? tree and small boats along a waterway at sunrise .
boat, tree, waterway

What are the keywords in the following sentence? Men buying things from the market.
buy, market, thing

What are the keywords in the following sentence? A bathroom stall containing an empty toilet in it.
contain, stall, toilet