My dentist appointment is 1:30.  Alert me 30 minutes before so I won't be late
[IN:CREATE_REMINDER [SL:TODO [IN:GET_TODO [SL:TODO My dentist appointment ] is [SL:DATE_TIME 1 : 30 ] ] ] . Alert [SL:PERSON_REMINDED me ] [SL:DATE_TIME 30 minutes before ] so I won't be late ]