Problem: What are the most important words?
zoo is a major landmark and attracts visitors
Answer: attract, visitor, zoo

Problem: What are the most important words?
the moon passes between the sun and the earth during a total solar eclipse
Answer: eclipse, moon, pass, sun

Problem: What are the most important words?
time lapse footage with tilt up motion of the sun streaking through window of ruin
Answer:
footage, streak, sun, tilt, window