A fluidity improver for a PC resin that improves the melt fluidity during molding without impairing the excellent properties of the PC resin, and also yields a molded product in which external appearance defects are unlikely. The system includes a thoracic volume input module measuring thoracic volume data of the subject and a pattern module providing target breathing patterns in communication with a display generator. A detecting device determines when the subject responds to the light. A product FDCA composition is produced having a low amount of tetrahydrofuran dicarboxylic acid, a low b*, and a low amount of 5-formyl furan-2-carboxylic acid. In one embodiment, a software-based customer relationship management system and method may include the hierarchical tagging system. In another aspect, the head may be located on the air bearing surface between carbide pad structures.