CREATE TABLE student (stuid DECIMAL, lname TEXT, fname TEXT, age DECIMAL, sex TEXT, major DECIMAL, advisor DECIMAL, city_code TEXT)
CREATE TABLE allergy_type (allergy TEXT, allergytype TEXT)
CREATE TABLE has_allergy (stuid DECIMAL, allergy TEXT)

Find the last name and age of the student who has allergy to both 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 "Milk" = "allergy" INTERSECT SELECT "stuid" FROM "has_allergy" WHERE "Cat" = "allergy")