The data was a list of 41,087 questions, some of which were suggested by users, and some (about 10%) were created by editors. The challenge is distinguish questions prepared by professional authors from questions suggested by game users.

"Clever" is an entertaining game with prizes that took place from March 14 to December 31, 2018 in a special mobile application. In the game, the participants had to choose the correct answer to the question asked from the three proposed options. Players who answered correctly all 12-15 questions of the game session equally divided the money fund being played.

The data for this problem was taken from the ML Boot Camp platform, from the materials of the VK Cup competition.