How long will it take for me to drive to my 6pm dentist's appointment?
[IN:GET_ESTIMATED_DURATION How long will it take for me to [SL:METHOD_TRAVEL drive ] to [SL:DESTINATION [IN:GET_EVENT [SL:ATTENDEE_EVENT my ] [SL:DATE_TIME 6 pm ] [SL:CATEGORY_EVENT dentist 's appointment ] ] ] ? ]