Every morning he put a <e1>stone</e1> into the <e2>cup</e2> without knowing that one of his friends put a handful of stones in it, to play a trick on him.
Every morning he put
Every morning he put a stone into the cup without knowing that one of his friends put a handful of stones in it, to play a trick on him.
<triplet> stone <subject> cup <object> Entity-Destination(e1,e2)