What is the total number of all bills co-sponsored associated with all amendments sponsored under 15, all bills sponsored of 6, and 0 amendments cosponsored?
CREATE TABLE "legislation_sponsored_by_john_mc_cain" (
  "years_covered" text,
  "all_bills_sponsored" real,
  "all_amendments_sponsored" real,
  "all_bills_cosponsored" real,
  "all_amendments_cosponsored" real,
  "bills_originally_cosponsored" real,
  "amendments_originally_cosponsored" real
);
SELECT COUNT("all_bills_cosponsored") FROM "legislation_sponsored_by_john_mc_cain" WHERE "all_amendments_sponsored"<15 AND "all_bills_sponsored"=6 AND "all_amendments_cosponsored"<0;