Cancel the reminder about dinner with my younger sister this Saturday night.
[IN:DELETE_REMINDER Cancel the reminder about [SL:TODO [IN:GET_TODO [SL:TODO dinner ] with [SL:ATTENDEE [IN:GET_CONTACT [SL:CONTACT_RELATED my ] [SL:AGE younger ] [SL:TYPE_RELATION sister ] ] ] ] ] [SL:DATE_TIME this Saturday night ] . ]