Hokenjowa [ shokuchudokukanjazen'inga NAnio tabetaka ] kakuninshiyoutoshiteiruno?
health.department-Top food.poisoning-victim-all-Nom what- Acc ate-CompWthr trying.to.confirm-CompWh
What1 is such that the Department of Health is trying to confirm [ whether all of those who suffered from food poisoning ate it1 ]?