What are the keywords in the following sentence? apps shown on computer and invention
app, computer, invention

What are the keywords in the following sentence? religious leader receives in politician and his wife .
leader, politician, receive, wife

What are the keywords in the following sentence? good idea pet shop offering summer sale on their products .
product, sale, shop

What are the keywords in the following sentence? With her free hand, she grasps along pipe running along the ceiling, propelling herself down the hallway.
ceiling, grasp, hand, pipe, run