Which Senator has a Party of republican, a Home Town of houston, and a District of 7?
CREATE TABLE "senate" (
  "senator" text,
  "party" text,
  "district" real,
  "home_town" text,
  "took_office" real
);
SELECT "senator" FROM "senate" WHERE "party"='republican' AND "home_town"='houston' AND "district"=7;