What are the keywords in the following sentence? a city is full of narrow old streets with tiny shops and cafes
cafe, city, street

What are the keywords in the following sentence? students volunteer to help students .
help, student, volunteer

What are the keywords in the following sentence? an airplane is flying past a large city
airplane, city, fly

What are the keywords in the following sentence? honey bee pollinate yellow flower in the spring meadow .
bee, flower, meadow