What are the keywords in the following sentence? an aircraft flies over clouds and mountains over us states
cloud, mountain, state

What are the keywords in the following sentence? brown bear feeding on a salmon by a creek
bear, feed, salmon

What are the keywords in the following sentence? hikers on a wooden bridge leading across a small stream in the middle of lush forest
bridge, lead, stream

What are the keywords in the following sentence? time lapse of big clouds with small commercial jet in the distance
cloud, distance, lapse