What are the keywords in the following sentence? Various jets parked in their terminals at the airport
airport, park, terminal

What are the keywords in the following sentence? the sun rises through the city on a misty morning .
city, morning, rise, sun

What are the keywords in the following sentence? the interior living space is not divided into smaller rooms .
divide, live, space

What are the keywords in the following sentence? balloons of various colours floating up the sky
balloon, colour, float, sky