What are the keywords in the following sentence? oak tree in a field on blue sky
field, sky, tree

What are the keywords in the following sentence? A clock mounted to a wall next to tall buildings.
building, clock, wall

What are the keywords in the following sentence? the roof of a church has been blown off in the wild storms that ripped through governmental jurisdiction .
blow, roof, storm

What are the keywords in the following sentence? Resting on top of a toilet near the shower
shower, toilet, top