What are the keywords in the following sentence? add a layer of chocolate mousse and sprinkle with grated chocolate .
add, chocolate, layer

What are the keywords in the following sentence? A blue train moving next to a building.
building, move, train

What are the keywords in the following sentence? wild boar digging up food in the soil with its snout in forest
boar, dig, food, snout, soil

What are the keywords in the following sentence? monarch and his family joined with monarch and his family for a formal portrait
family, monarch, portrait