context: The English inventor Sir George Kylie built in 1809 the first successful life-sized glider, and in 1853 he made a very primitive glider. This plane carried the Kylie trainer through a small valley. German engineer Otto Lilienthal became the first person to pilot a glider, and between 1891 and 1896 he completed about 2,500 gliders, and in 1897 Scottish engineer Pierce S was used. Pilcher first application of traction techniques in aiding gliders to take off. Lilienthal and Belscher have both died in crashes of their gliders.
question: Who discovered the glider?
answers.text: George Kylie