Just Joke - Sentence making

Children were called upon in a classroom to make sentences with words chosen by the teacher. The teacher smiled when Jack raised his hand to participate. She gave him the words 'defeat,' 'deduct,' 'defense,' and 'detail.' Jack stood seriously for a while with all eyes focused on him awaiting his reply:

''Defeat of deduct went over defense before detail!''

The feet of the duck went over the fence before the tail