What are the keywords in the following sentence? A man serving pieces of a train shaped cake to children.
cake, piece, shape

What are the keywords in the following sentence? happy family have fun lying on the grass .
fun, grass, lie

What are the keywords in the following sentence? A group of people gather on a rainy day under umbrellas.
day, gather, umbrella

What are the keywords in the following sentence? a group of zebras searching for food in the wild
food, search, zebra