Question: Who are the owners of the programs that broadcast both in the morning and at night?
SQL: SELECT t1.owner FROM program AS t1 JOIN broadcast AS t2 ON t1.program_id  =  t2.program_id WHERE t2.Time_of_day  =  "Morning" INTERSECT SELECT t1.owner FROM program AS t1 JOIN broadcast AS t2 ON t1.program_id  =  t2.program_id WHERE t2.Time_of_day  =  "Night"