CREATE TABLE Student (StuID INT, LName VARCHAR, Fname VARCHAR, Age INT, Sex VARCHAR, Major INT, Advisor INT, city_code VARCHAR)
CREATE TABLE Has_Allergy (StuID INT, Allergy VARCHAR)
CREATE TABLE Allergy_Type (Allergy VARCHAR, AllergyType VARCHAR)

Show me the proportion on what are the last names and ages of the students who are allergic to milk and cat?
SELECT LName, Age FROM Student WHERE StuID IN (SELECT StuID FROM Has_Allergy WHERE Allergy = "Milk" INTERSECT SELECT StuID FROM Has_Allergy WHERE Allergy = "Cat")
SELECT "LName", "Age" FROM "Student" WHERE "StuID" IN (SELECT "StuID" FROM "Has_Allergy" WHERE "Allergy" = "Milk" INTERSECT SELECT "StuID" FROM "Has_Allergy" WHERE "Allergy" = "Cat")