What are the keywords in the following sentence? a student cleans the blackboard in a secondary modern school classroom
classroom, clean, student

What are the keywords in the following sentence? bride walked down the aisle by mom and dad .
aisle, dad, walk

What are the keywords in the following sentence? A young woman uses an egg beater to mix the contents of a large Pyrex cup.
beater, cup, mix

What are the keywords in the following sentence? One man cutting the cast off another man's arm.
arm, cast, cut