Question: The MG EX-E is a concept car that was produced by a manufacturer  are best known for which type of car ?

Context paragraphs:
Concept car: A concept car (also known as concept vehicle, show vehicle or prototype) is a car made to showcase new styling and/or new technology.  They are often shown at motor shows to gauge customer reaction to new and radical designs which may or may not be mass-produced.  General Motors designer Harley Earl is generally credited with inventing the concept car, and did much to popularize it through its traveling Motorama shows of the 1950s.

MG Cars: MG, the initials of Morris Garages, is an English automotive marque registered by the now defunct MG Car Company Limited, a British sports car manufacturer begun in the 1920s as a sales promotion sideline within W R Morris's Oxford city retail sales and service business by the business's manager, Cecil Kimber.  Best known for its two-seat open sports cars, MG also produced saloons and coupés. Kimber was an employee of William Morris.

MG M-type: The MG M-type (also known as the MG Midget) is a sports car that was produced by the MG Cars from April 1929 to 1932.  It was sometimes referred to as the 8/33.  Launched at the 1928 London Motor Show when the sales of the larger MG saloons was faltering because of the economic climate, the small car brought MG ownership to a new sector of the market and probably saved the company.  Early cars were made in the Cowley factory, but from 1930 production had transferred to Abingdon.

MG EX-E: The MG EX-E is a concept car that was produced by MG and presented at the Frankfurt Motor Show in 1985.  The EX-E was a mid-engined sportscar inspired by the Ferrari 308 and designed by Roy Axe and Gerry McGovern.  The car's drivetrain and chassis were derived from the mid-engined MG Metro 6R4 rally car.  The EX-E concept car did not lead to a production version, although Gerry McGovern did go on to style the later, smaller MG F sportscar.

Mako Shark (concept car): The XP-755 concept car, also known as the Mako Shark, was designed by Larry Shinoda under the direction of General Motors Styling and Design head Bill Mitchell in 1961, as a concept for future Chevrolet Corvette production cars.  In keeping with the name, the streamlining, pointed snout, and other detailing was partly inspired by the sleek, fast-moving shortfin mako shark.  The '61 Corvette tail was given two additional tail lights (six total) for the concept car.  The concept was inspired by Bill Mitchell's 1959 Stingray racer XP87 which also inspired the 1963 Corvette Sting Ray.

MG SA: The MG SA or MG 2-litre is a sporting saloon that was produced by MG from 1936 to 1939.  Launched as the 2 litre, it only later became known as the SA, the car had been originally planned as an advanced performance saloon to rival the likes of SS Cars (later to be known as Jaguar) and even Bentley with all independent suspension and was given the factory code of EX150 and designated the S-type.  A prototype was made but with the amalgamation of MG with Morris Motors in 1935 development stopped.  The Cowley drawing office picked up the project again but a much more conservative car appeared with conventional live rear and beam front axles.

MG J-type: The MG J-type is a sports car that was produced by MG from 1932 to 1934.  This 2-door sports car used an updated version of the overhead camshaft, crossflow engine, used in the 1928 Morris Minor and Wolseley 10 and previously fitted in the MG M-type Midget of 1929 to 1932, driving the rear wheels through a four-speed non-synchromesh gearbox.  The chassis was from the D-Type with suspension by half-elliptic springs and Hartford friction shock absorbers all round with rigid front and rear axles.  The car had a wheelbase of 86 inches (2184 mm) and a track of 42 inches (1067 mm).  Most cars were open two-seaters, but a closed salonette version of the J1 was also made, and some chassis were supplied to external coachbuilders.  The open cars can be distinguished from the M type by having cut-away tops to the doors.

MG 5: The MG 5 is a compact car that has been produced by the British company MG Motor from 2012 onwards.  It was launched on 28 March 2012 in China, and shares the same automotive platform with the Roewe 350 saloon car.  The MG 5 debuted in concept car form at the 2011 Shanghai Auto Show as the MG Concept5.

Citroën C-Métisse: The Citroën C-Métisse is a concept car produced by the French car manufacturer Citroën.  It was first introduced in 2006 at the Paris autoshow.  It has been stated that the reason for creating such a car was to show that a hybrid car can have the same performance as a gasoline- or diesel-powered car.  The car is a 5-door 2+2 shooting-brake.

Volkswagen Concept BlueSport: The Volkswagen Concept BlueSport is a mid-engined roadster concept car produced by Volkswagen.  It was introduced at the 2009 North American International Auto Show in Detroit.  The Concept BlueSport follows on from a previous roadster concept car, the Volkswagen Concept R, shown at the 2003 Frankfurt Motor Show.

Supporting paragraphs: MG EX-E MG Cars
Answer: two-seat open sports cars