Remind me to cancel the concert event that's on August 15th - remind me on August 14th
[IN:CREATE_REMINDER Remind [SL:PERSON_REMINDED me ] to [SL:TODO [IN:GET_TODO [SL:TODO cancel the concert event ] that 's [SL:DATE_TIME on August 15th ] ] ] - remind me [SL:DATE_TIME on August 14th ] ]