what are the event details of the services that have the type code 'Marriage'?
SELECT T1.event_details FROM EVENTS AS T1 JOIN Services AS T2 ON T1.Service_ID  =  T2.Service_ID WHERE T2.Service_Type_Code  =  'Marriage'
event details of the services refers to T1.event_details; type code 'Marriage' refers to WHERE T2.Service_Type_Code = 'Marriage';