What is the Mayor of Riva del Garda in 2010?
CREATE TABLE "municipalities_in_trentino" (
  "municipality" text,
  "inhabitants" real,
  "mayor" text,
  "party" text,
  "election" real
);
SELECT "mayor" FROM "municipalities_in_trentino" WHERE "election"=2010 AND "municipality"='riva del garda';