Problem: What are the most important words?
stained glass window depicting the birth of builder
Answer: birth, builder, depict, stain, window

Problem: What are the most important words?
looking down on harbour at low tide on a sunny winter day
Answer: day, harbour, look

Problem: What are the most important words?
A young woman uses an egg beater to mix the contents of a large Pyrex cup.
Answer:
beater, cup, mix