Who is the head of household for task number 7?
CREATE TABLE "head_of_household_and_hand_grenade" (
  "task_no" real,
  "date_given" text,
  "head_of_household" text,
  "hand_grenade_user" text,
  "hand_grenade_recipient" text
);
SELECT "head_of_household" FROM "head_of_household_and_hand_grenade" WHERE "task_no"=7;