What are the keywords in the following sentence? lobby in hotel in the old city
city, hotel, lobby

What are the keywords in the following sentence? riot police use tear gas to disperse demonstrators as they try to march during a protest .
demonstrator, gas, protest, use

What are the keywords in the following sentence? a tent pitched up in a field near bridge on the bank
bank, pitch, tent

What are the keywords in the following sentence? A train moving down the track blows steam from its exahust
move, steam, track, train