Question: Can you filter the list to only show student IDs that have food and animal type allergies?
SQL: SELECT T1.StuID FROM Has_allergy AS T1 JOIN Allergy_Type AS T2 ON T1.Allergy   =   T2.Allergy WHERE T2.allergytype   =   "food" INTERSECT SELECT T1.StuID FROM Has_allergy AS T1 JOIN Allergy_Type AS T2 ON T1.Allergy   =   T2.Allergy WHERE T2.allergytype   =   "animal"