_:b663914056 . _:b663914056 "b is a continuant fiat boundary = Def. b is an immaterial entity that is of zero, one or two dimensions and does not include a spatial region as part. (axiom label in BFO2 Reference: [029-001])"@en . _:b663914056 . _:b663914056 . _:b663914056 . _:b663914056 . _:b663914056 .