Question: Lockheed Martin F-35 Lightning II development started in 1992 with the origins of the Joint Strike Fighter program and is set to culminate in full production in 2018, unlike the F-22 Raptor, is intended to be available for export, the Lockheed Martin F-22 Raptor is a fifth-generation, single-seat, twin-engine, all-weather stealth tactical fighter aircraft, developed for which organization?
Sentence (from "Lockheed Martin F-35 Lightning II development"): Three variants were designed: the F-35A (conventional take off and landing, CTOL), the F-35B (short-take off and vertical-landing, STOVL), and the F-35C (carrier-based CATOBAR, CV).
Relevant evidence: No