Problem: What are the most important words?
happy businessman looking at the map in his smartphone how to get around the city .
Answer: city, look, map, smartphone

Problem: What are the most important words?
A sheep and young offspring grazing on a grassy field.
Answer: field, offspring, sheep

Problem: What are the most important words?
a butterfly searching for and feeding nectar from flowers
Answer:
butterfly, feed, flower, nectar