What are the keywords in the following sentence? Parking meter at curb showing 3 hours and 55 minutes remaining.
hour, meter, minute

What are the keywords in the following sentence? beds edged with lavender in full flower in the garden
bed, edge, garden

What are the keywords in the following sentence? garden in the painting on canvas
canvas, garden, painting

What are the keywords in the following sentence? A train traveling under a bridge next to other tracks.
bridge, track, train, travel