With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Adderall affects control.
text_B: The Boeing Skyfox was a twin-engined jet trainer aircraft , a highly upgraded development of the Lockheed T-33 .. Lockheed T-33. Lockheed T-33. Boeing. Boeing. It was designed as a primary trainer to compete with and replace the Cessna T-37 Tweet .. Cessna T-37 Tweet. Cessna T-37 Tweet. Besides its primary role as a trainer , the aircraft was envisioned to have other roles as well , including ground attack .. ground attack. Ground-attack aircraft. The program was started by the Skyfox Corporation in 1983 , and was acquired by Boeing in 1986 .. Boeing. Boeing. The program included the replacement of the Allison J33-A-35 turbojet by two Garrett TFE731-3A turbofans .. Allison J33-A-35. Allison J33. turbojet. turbojet. Garrett TFE731-3A. Garrett TFE731. It also included an extensive redesign of the airframe .. Only one prototype aircraft was built , and the program was later canceled due to lack of customers .
not_related.