What are the keywords in the following sentence? the pilots who flew military transport aircraft into country .
country, fly, pilot

What are the keywords in the following sentence? sometimes organisms live in relationships that are parasitic .
live, organism, relationship

What are the keywords in the following sentence? A bunch of sheep make their way through the crowded city street.
sheep, street, way

What are the keywords in the following sentence? discuss adaptations of organisms living in each of the ecosystems
discuss, live, organism