def register_entity(self, entity_value, entity_type, alias_of=None):
if alias_of:<EOL><INDENT>self.trie.insert(entity_value.lower(), data=(alias_of, entity_type))<EOL><DEDENT>else:<EOL><INDENT>self.trie.insert(entity_value.lower(), data=(entity_value, entity_type))<EOL>self.trie.insert(entity_type.lower(), data=(entity_type, '<STR_LIT>'))<EOL><DEDENT>
Register an entity to be tagged in potential parse results

Args:
    entity_value(str): the value/proper name of an entity instance (Ex: "The Big Bang Theory")
    entity_type(str): the type/tag of an entity instance (Ex: "Television Show")