Database: allergy_1
Question: Find the different first names and cities of the students who have allergy to milk or cat.
SQL:
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"