Set up a reminder for Frank and Bob's wedding on September 3rd; remind me to buy a gift a week in advance.
[IN:CREATE_REMINDER Set up a reminder for [SL:TODO [IN:GET_TODO [SL:TODO Frank and Bob 's wedding ] [SL:DATE_TIME on September 3rd ] ] ] ; remind [SL:PERSON_REMINDED me ] to [SL:TODO buy a gift ] [SL:DATE_TIME a week in advance ] . ]