What are the keywords in the following sentence? Bicyclists racing in a marathon with spectators throwing bottles at them.
bicyclist, marathon, race

What are the keywords in the following sentence? environmentalist and his wife arrive for the red carpet of festival .
carpet, environmentalist, festival

What are the keywords in the following sentence? Four people are wearing swimsuits in the summer.
summer, swimsuit, wear

What are the keywords in the following sentence? tourists and shoppers walk along a city in city centre
centre, shopper, tourist