What are the keywords in the following sentence? time lapse of an airport runway and control tower with planes taking off and landing
land, plane, take, tower

What are the keywords in the following sentence? the hotel is undergoing a renovation to its rooms .
hotel, renovation, room

What are the keywords in the following sentence? The dogs are trained to play this way
dog, train, way

What are the keywords in the following sentence? crossing railway in the junction of the urban station
cross, railway, station