What are the keywords in the following sentence? graduating cadets stand at attention inside their football stadium .
attention, cadet, stand

What are the keywords in the following sentence? A number of planes parked in an airport runway
number, park, plane

What are the keywords in the following sentence? a climber scales an arch from the remains of a collapsed cave
arch, cave, climber, collapse, remain

What are the keywords in the following sentence? planes fly around the globe
fly, globe, plane