What are the keywords in the following sentence? building will connect mass transportation system .
building, connect, system

What are the keywords in the following sentence? a levitated queen sized bed with plush pillows .
bed, pillow, queen

What are the keywords in the following sentence? A large jet plane is parked at a gate in an airport.
airport, gate, park, plane

What are the keywords in the following sentence? A child crawls along the grass looking for bugs.
crawl, grass, look