Question: What transportation with gull-wing doors was used in the Back to the Future franchise?
Related documents: [0]  [DOC] The DeLorean DMC-12 (commonly referred to simply as "the DeLorean," as it was the only model ever produced by the company) is a sports car manufactured by John DeLorean's DeLorean Motor Company for the American market from 1981–83. The car features gull-wing doors and an innovative fiberglass body structure with a steel backbone chassis, along with external brushed stainless steel body panels. It became widely known and iconic for its appearance, and a modified DMC-12 was immortalized as the DeLorean time machine in the "Back to the Future" media franchise. [END] 
[1]  [DOC] The DeLorean time machine is a fictional automobile-based time travel device featured in the "Back to the Future" franchise. In the feature film series, Dr. Emmett Brown builds a time machine based on a DeLorean DMC-12 car, to gain insights into history and the future. Instead, he ends up using it to travel over 130 years of Hill Valley history (from 1885 to 2015) with Marty McFly to change the past for the better and to undo the negative effects of time travel. One of the cars used in filming is on display at Universal Studios Hollywood. [END] 
Answer: 
DeLorean DMC-12
DeLorean DMC-12