The rule that the function normally applies does not hold for all inputs. For some words such as "Bear," "López Obrador," "Zircon," "Wolf," and "tree," the function returns "undefined," indicating that it does not have information about the location for these inputs. It seems that the function's rule specifically applies to geographical entities rather than general words.

Please let me know if you would like me to further investigate or if there's anything else I can assist you with.