Problem: What are the most important words?
a red maple leaf drifting slowly on rippling water
Answer: leaf, ripple, water

Problem: What are the most important words?
A fruit salad that includes a variety of fruit.
Answer: fruit, include, salad

Problem: What are the most important words?
time lapse at dusk with clouds moving over the city and a full moon rising
Answer:
city, cloud, lapse, move