What are the keywords in the following sentence? cover an old tote bag in duct tape to make it waterproof for the pool or beach .
bag, cover, tape

What are the keywords in the following sentence? aircraft departs on a mission .
aircraft, depart, mission

What are the keywords in the following sentence? a customer buying organic vegetable in shopping mall
buy, mall, vegetable

What are the keywords in the following sentence? dolphins swimming in front of the bow of a ship at slow speed
dolphin, front, ship, speed, swim