Problem: What are the most important words?
this image taken by spacecraft shows a portion of extraterrestrial location .
Answer: image, location, spacecraft, take

Problem: What are the most important words?
student doing maths on the blackboard with teacher overseeing
Answer: math, student, teacher

Problem: What are the most important words?
married couple having fun on a field with hay bale .
Answer:
bale, couple, field