What are the keywords in the following sentence? girl watching waterfalls from nearby bridge
bridge, watch, waterfall

What are the keywords in the following sentence? time lapse of clouds streaming through a valley to the sea
cloud, sea, valley

What are the keywords in the following sentence? portrait of a man sitting on a skateboard smiling
portrait, sit, smiling

What are the keywords in the following sentence? woman giving husband a croissant while they are having breakfast in bed
bed, breakfast, give