What are the keywords in the following sentence? the silhouette of an old ugly witch who conjures a cauldron
cauldron, silhouette, witch

What are the keywords in the following sentence? a number of small boats on a beach
beach, boat, number

What are the keywords in the following sentence? egret perched near a fallen tree at the edge of a lake in summer
lake, perch, tree

What are the keywords in the following sentence? pastries on a serving dish
dish, pastry, serve