What are the keywords in the following sentence? players and manager bow their heads in remembrance during a minutes silence
bow, head, player, remembrance, silence

What are the keywords in the following sentence? olympic athlete poses with her medal after completing recurring competition
athlete, competition, complete, recur

What are the keywords in the following sentence? A man is intently observing a slide through a microscope.
microscope, observe, slide

What are the keywords in the following sentence? narrow window admits a shaft of light
light, shaft, window