What are the keywords in the following sentence? collection of shells collected in the sea for collectors
collect, sea, shell

What are the keywords in the following sentence? A woman is collecting mushrooms off the ground, then she wipes a mushroom with her hand.
collect, hand, mushroom

What are the keywords in the following sentence? White toilet and sink in white tiled walled bathroom.
bathroom, sink, tile, toilet

What are the keywords in the following sentence? a large orange tiger lying in a grass
grass, lie, tiger