What are the keywords in the following sentence? rope coiled on an old weathered dock
coil, dock, rope

What are the keywords in the following sentence? a lighthouse shines out to sea to warn passing boats and ships
boat, pass, sea, ship

What are the keywords in the following sentence? A man does work in a flower bed while a woman watches him.
bed, watch, work

What are the keywords in the following sentence? Three zebras in the sun in their enclosure.
enclosure, sun, zebra