What are the keywords in the following sentence? bicycles are locked to the railing of a pedestrian bridge over the canals with the date .
bicycle, canal, lock, railing

What are the keywords in the following sentence? padlock in a shape of heart locked on a chain
chain, lock, padlock

What are the keywords in the following sentence? field of growing rye on the wind
field, grow, rye

What are the keywords in the following sentence? clouds disappearing in the sky
cloud, disappear, sky