-- Database schema
| Allergy_Type : Allergy [ TEXT ] primary_key , AllergyType [ TEXT ] | Has_Allergy : StuID [ INT ] Has_Allergy.StuID = Student.StuID , Allergy [ TEXT ] Has_Allergy.Allergy = Allergy_Type.Allergy | Student : StuID [ INT ] primary_key , LName [ TEXT ] , Fname [ TEXT ] , Age [ INT ] , Sex [ TEXT ] , Major [ INT ] , Advisor [ INT ] , city_code [ TEXT ] |
-- -- Find the different first names and cities of the students who have allergy to milk or cat.

SELECT DISTINCT T1.fname ,  T1.city_code FROM Student AS T1 JOIN Has_Allergy AS T2 ON T1.stuid  =  T2.stuid WHERE T2.Allergy  =  "Milk" OR T2.Allergy  =  "Cat";