Use "demonstrator" in a sentence

1. My new demonstrator wasn’t

2. The Tea Party demonstrator whose placard read “Grandma’s Not Shovel Ready” gets the point exactly

3. If the human element is to remain relevant it has to transcend beyond being a mere demonstrator of the emerging smart educational system to become a wisdom teacher of its culture's attractors

4. There was Jessop, at the art school; Swain, who was chemistry demonstrator at the university; Newton, who was a teacher; besides Edgar and Miriam's younger brothers

5. Hence the advent, apparently tardy, of the Tacituses and the Juvenals; it is in the hour for evidence, that the demonstrator makes his appearance