What are the keywords in the following sentence? demolition a listed building built after it was gutted by fire
building, demolition, list

What are the keywords in the following sentence? Traffic in a Chinese city, bicyclists, autos, and motorized three wheel transports.
bicyclist, city, traffic

What are the keywords in the following sentence? a helicopter flies a mission to move equipment over province .
helicopter, mission, province

What are the keywords in the following sentence? ships passing as they enter the southern end
enter, pass, ship