Piedmont Opera Theatre’s production of Mozart’s “The Marriage of Figaro” is coming to Winston-Salem april 7, 9 and 11.If you’re interested in what it will take to put it together, what kind of people compile an opera’s shopping list and who does it all, read on. Let’s start with General Director, Norman Johnson – quiet, soft-spoken, disarmingly modest, not your average impresario. Before one opera is over he’s already out shopping for the next.”I’ll need thirty singers for the chorus, nine soloists, about thirty-five musicians in the pit…”