Problem: What are the most important words?
Airplanes on a runway and landing at an airport.
Answer: airplane, landing, runway

Problem: What are the most important words?
a small beach under late gothic revival structure on the side is a welcome resting place for kayakers
Answer: beach, place, rest

Problem: What are the most important words?
sun illuminating at sunrise planet earth in the space
Answer:
illuminate, space, sun