What are the keywords in the following sentence? clusters of white grapes hanging from the vine highlighted by the sun
cluster, sun, vine

What are the keywords in the following sentence? dark clouds on the sky before thunderstorm
cloud, sky, thunderstorm

What are the keywords in the following sentence? flying between trees with a drone
drone, fly, tree

What are the keywords in the following sentence? collecting drinking water from the tank
collect, tank, water