If I need to be at work at 9 AM, when do I need to leave my mom's house?
[IN:GET_ESTIMATED_DEPARTURE If I need to be at [SL:DESTINATION [IN:GET_LOCATION_WORK work ] ] [SL:DATE_TIME_ARRIVAL at 9 AM ] , when do I need to leave [SL:SOURCE [IN:GET_LOCATION_HOME [SL:CONTACT_RELATED my ] [SL:TYPE_RELATION mom ] 's house ] ] ? ]