Question: Show the church names for the weddings of all people older than 30.
SQL: SELECT T4.name FROM wedding AS T1 JOIN people AS T2 ON T1.male_id  =  T2.people_id JOIN people AS T3 ON T1.female_id  =  T3.people_id JOIN church AS T4 ON T4.church_id  =  T1.church_id WHERE T2.age  >  30 OR T3.age  >  30