Remind me 12 hours prior to my routine Dentist appointment, in personal calendar, that I have my recurring  dentist appointment automatically scheduled and  that I must prepare- I mean floss for  !
[IN:CREATE_REMINDER Remind [SL:PERSON_REMINDED me ] [SL:DATE_TIME 12 hours prior ] to [SL:TODO my routine Dentist appointment ] , in personal calendar , that I have [SL:TODO my recurring dentist appointment automatically scheduled and that I must prepare - I mean floss for ] ! ]