I want to be at mom's by 7 pm, what time would I need to leave today?
[IN:GET_ESTIMATED_DEPARTURE I want to be at [SL:DESTINATION [IN:GET_LOCATION_HOME [SL:TYPE_RELATION mom ] ] ] 's [SL:DATE_TIME_ARRIVAL by 7 pm ] , what time would I need to leave [SL:DATE_TIME_DEPARTURE today ] ? ]