Give me the quickest route to the Celtic's game from my sister's house.
[IN:GET_DIRECTIONS Give me the quickest route to [SL:DESTINATION [IN:GET_EVENT the [SL:NAME_EVENT Celtic ] 's [SL:CATEGORY_EVENT game ] ] ] from [SL:SOURCE [IN:GET_LOCATION_HOME [SL:CONTACT_RELATED my ] [SL:TYPE_RELATION sister ] 's house ] ] . ]