Abstract: A hat organizer is configured to hold at least one baseball cap and is mounted on a mounting surface of a mounting object. The hat organizer includes a cap body limiting portion. The hat organizer defines a cap body accommodating space. The cap body limiting portion is disposed around the mounting surface of the mounting object to form the cap body accommodating space. The cap body accommodating space is configured to accommodate a cap body of the at least one baseball cap. The cap body limiting portion is configured to limit the cap body. The cap body limiting portion forms an inner surface of the cap body accommodating space. A radian of the inner surface of the cap body accommodating space is matched with a radian of an outer surface of a dome of the cap body to prevent the cap body from deformation.

Abstract: Knowledge map-based question-answer method, server, and storage medium are provided. The method includes obtaining a natural query sentence inputted by a user, and identifying a globally unique identifier, with respect to the knowledge map, of an entity in the natural query sentence. The knowledge map includes attributes and attribute values of entities and relationships thereof. The method also includes according to a context-free grammar rule, parsing the natural query sentence into a syntax tree, and according to the syntax tree, obtaining a logical expression corresponding to the natural query sentence. Moreover, the method includes according to the logical expression and the globally unique identifier of the entity, generating a machine query sentence corresponding to the knowledge map.

Abstract: Knowledge map-based question-answer method, server, and storage medium are provided. The method includes obtaining a natural query sentence inputted by a user, and identifying a globally unique identifier, with respect to the knowledge map, of an entity in the natural query sentence. The knowledge map includes attributes and attribute values of entities and relationships thereof. The method also includes according to a context-free grammar rule, parsing the natural query sentence into a syntax tree, and according to the syntax tree, obtaining a logical expression corresponding to the natural query sentence. Moreover, the method includes according to the logical expression and the globally unique identifier of the entity, generating a machine query sentence corresponding to the knowledge map.