What are the keywords in the following sentence? a wall of water comes
come, wall, water

What are the keywords in the following sentence? woman and cute young boy in silhouette looking at sharks and other fish in an aquarium
aquarium, fish, look, shark

What are the keywords in the following sentence? time lapse of a sunrise over a forest covered valley .
cover, sunrise, valley

What are the keywords in the following sentence? time lapse of moving clouds and the rocky landscape
cloud, landscape, lapse, move