What are the keywords in the following sentence? a city is lit up by fireworks .
city, firework, light

What are the keywords in the following sentence? A white vintage airplane in flight over a grass runway.
airplane, flight, runway

What are the keywords in the following sentence? motion of nurse and patient walking through the ward inside hospital
hospital, nurse, patient, walk

What are the keywords in the following sentence? the shore of a lake in summer
lake, shore, summer