What are the keywords in the following sentence? boats moored in a port
boat, moor, port

What are the keywords in the following sentence? young woman feeds hungry cats on the stone pavement in the city .
city, feed, pavement

What are the keywords in the following sentence? a view of the nebula that highlights fledgling stars hidden in the gas and clouds .
cloud, gas, hide, highlight, star

What are the keywords in the following sentence? big bunch of bananas on sale in the market
banana, bunch, market, sale