What are the keywords in the following sentence? green birch trees on a clearing in the garden between large stones on the lawn .
garden, stone, tree

What are the keywords in the following sentence? low clouds roll in through the mountains
cloud, mountain, roll

What are the keywords in the following sentence? instructions explain that certain parts of the brain govern specific functions .
brain, function, part

What are the keywords in the following sentence? the guest of honour touring the mini booths at the event
event, guest, tour