Question: Could you please find the number of male (sex is 'M') students who have some type of food allergy?
SQL: SELECT count ( * )  FROM Student WHERE sex   =   "M" AND StuID IN  ( SELECT StuID FROM Has_allergy AS T1 JOIN Allergy_Type AS T2 ON T1.Allergy   =   T2.Allergy WHERE T2.allergytype   =   "food" )