Question: What plane is single-seat, twin-engine jet fighter?
Sentence (from "Shenyang J-11"): The Shenyang J-11 (Chinese: 歼-11), with NATO reporting name Flanker B+, is a single-seat, twin-engine jet fighter, whose airframe is based on the Soviet-designed Sukhoi Su-27 air superiority fighter.
Relevant evidence: Yes