Q & A: Carrie-Ann Matheson on Leading San Francisco Merola Young Singers & Adler Fellows Opera Programs By Lois Silverstein(Photo Credit: Olivia Kahler) What does it take to turn a gifted young musician into a first-rate opera singer? Not just a talented performer, but one who knows her craft and can sustain the life that comes with it? To find out, I spoke with Carrie-Ann Matheson, Artistic Direc...