What are the keywords in the following sentence? garden bench at a pond with a stone bridge
bench, bridge, pond

What are the keywords in the following sentence? grizzly bear siblings taking a refreshing bath to cool off .
bath, cool, take

What are the keywords in the following sentence? As the deputy approaches, someone lowers his gaze.
approach, gaze, lower

What are the keywords in the following sentence? female student falls asleep after been reading and studying all day in the library
fall, library, student