Database: allergy_1
Question: What are the distinct first names and the cities of students who have allergy either to milk or to 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"