What are the keywords in the following sentence? image of a cactus growing around a rock
grow, image, rock

What are the keywords in the following sentence? selection of food product on sale in a supermarket
product, sale, supermarket

What are the keywords in the following sentence? small lake with bridge and vegetation in the desert .
bridge, lake, vegetation

What are the keywords in the following sentence? A woman has her hair shampooed by a stylist in a salon.
hair, salon, shampoo, stylist