Problem: What are the most important words?
A herd of sheep relax on a grassy green field.
Answer: field, relax, sheep

Problem: What are the most important words?
A man cooks as a man stares off into space, a box of butter is in the foreground.
Answer: box, butter, cook, foreground, space

Problem: What are the most important words?
panoramic time lapse clouds floating over a wide valley against a distant mountain range
Answer:
cloud, range, valley