What are the keywords in the following sentence? A giraffe with its neck stretched over rocks and eating grass.
giraffe, grass, neck, stretch

What are the keywords in the following sentence? balloons and tunes in a silhouette of heart .
balloon, heart, silhouette

What are the keywords in the following sentence? priest performing prayers during festival .
festival, perform, priest

What are the keywords in the following sentence? A train running across a bridge over a lake.
bridge, lake, run