What are the keywords in the following sentence? full moon covered by a layer of clouds
cloud, cover, moon

What are the keywords in the following sentence? politician delivers to a joint session on tuesday as politician applauds and politician listen
deliver, politician, session

What are the keywords in the following sentence? pink tree under a heart shaped cloud
cloud, heart, shape

What are the keywords in the following sentence? politician plays piano before meeting politician on the first day on sunday .
meeting, piano, politician