if things are part of the same something, then those things are connected
part is tangible_thing. separated_thing is divided_thing. connected_physical_path_system is tangible_thing. part is relation. simply_connected_thing is not spatially_continuous_thing. simply_connected_thing is spatially_continuous_thing. simply_connected_space_region is not simply_connected_thing. simply_connected_space_region is simply_connected_thing. connection is relation. connected_physical_path_system is not tangible_thing.