What are the keywords in the following sentence? a member monitors the crowd at a celebration
celebration, crowd, member, monitor

What are the keywords in the following sentence? Three giraffes near some trees during the day.
day, giraffes, tree

What are the keywords in the following sentence? the actual crew of space mission returned after an explosion in space .
crew, mission, space

What are the keywords in the following sentence? time to change your life .
change, life, time