He saw a beaver building a dam of logs But what interested him most were the other frogs.
(He; saw; a beaver building a dam of logs But what interested him most were the other frogs) Context(He saw,List([0, 6))):(a beaver; building; a dam of logs)
He saw,List([0, 6))
He a beaver
saw building
a beaver building a dam of logs But what interested him most were the other frogs
a dam of logs