What are the keywords in the following sentence? jet plane parked in hangar
hangar, park, plane

What are the keywords in the following sentence? the bee has sat down on young sunflower has collected pollen and has departed
bee, sit, sunflower

What are the keywords in the following sentence? a small boat leaning on a small wall
boat, lean, wall

What are the keywords in the following sentence? mist floats over the summit of a mountain during sunrise
mist, mountain, summit