The Okanagan Highland is an elevated hilly plateau area in British Columbia, Canada, and the U.S. state of Washington (where it is spelled Okanogan Highlands). Rounded mountains with elevations up to 8,000 feet above sea level and deep, narrow valleys are characteristic of the region.
The Okanagan Highlands extend to Washington, DC.
The system saw Washington and did not realize the DC part was a separate geographical area.
( z1 extend :ARG1 ( z2 local-region :name ( z3 name :op "Okanagan" :op "Highlands" ) ) :ARG4 ( z4 city :name ( z5 name :op "Washington" :op "DC" ) ) )