A method for processing language input can include the step of determining at least two possible meanings for a language input. A plurality of cords C unwound from a plurality of reels 1a held in a wheeled creel 1 are passed through guide holes formed in a guide plate 21 and are extended to an insulation head 6. The system test is for testing a program within an environment. The frame includes an upper frame and a lower frame. This diffraction grating 5 exhibits a specific characteristic whereby the object beam emitted from the optical fiber 23 is emitted in the direction of the reference beam.