What are the keywords in the following sentence? a stone bridge over a stream leading into a lake
bridge, lake, lead

What are the keywords in the following sentence? a group of children are stealing food from a picnic they have found under a tree .
food, steal, tree

What are the keywords in the following sentence? biological species walking on the shore of a lake .
shore, specie, walk

What are the keywords in the following sentence? time lapse behind lake and hill in the morning
hill, lapse, morning