Table: pbb_double_up_tasks
Columns: task_no
date_given
head_of_household
hand_grenade_user
hand_grenade_recipient

Question: What date was Rica head of household?
SQL: SELECT "date_given" FROM pbb_double_up_tasks WHERE "head_of_household" = 'rica'

Question: What is the latest task number for which Cathy is head of household?
SQL: SELECT MAX("task_no") FROM pbb_double_up_tasks WHERE "head_of_household" = 'cathy'

Question: Who is the head of household for task number 7?
SQL: SELECT "head_of_household" FROM pbb_double_up_tasks WHERE "task_no" = 7

Question: Which task had Cathy as the hand grenade user?
SQL: SELECT "task_no" FROM pbb_double_up_tasks WHERE "hand_grenade_user" = 'cathy'

Question: What is the task number on January 22, 2010 (day 111)?
SQL: SELECT MAX("task_no") FROM pbb_double_up_tasks WHERE "date_given" = 'january 22, 2010 (day 111)'