Who sponsored the bill introduced on June 9, 2011?
CREATE TABLE "legislative_history" (
  "congress" text,
  "bill_number_s" text,
  "date_introduced" text,
  "sponsor_s" text,
  "num_of_cosponsors" real,
  "latest_status" text
);
SELECT "sponsor_s" FROM "legislative_history" WHERE "date_introduced"='june 9, 2011';