What are the keywords in the following sentence? bull and bear in front
bear, bull, front

What are the keywords in the following sentence? a container ship into docks for unloading its cargo
cargo, dock, unload

What are the keywords in the following sentence? Two giraffes standing in an enclosure at the zoo.
enclosure, giraffes, zoo

What are the keywords in the following sentence? create and order custom posters based on your favorite places .
base, create, poster