context: B.A.P. was initiated and began promoting at the end of 2011, starting with Yong Guk, who took the role of leader in the group. [1] He signed a contract with TS Entertainment and duet with his label, Song Jieun with the song "Going Crazy". [2] He made his solo debut on August 11, 2011 with the single "I Remember", a duet with Yang Yo-seob from B2ST. [3] The second member, Himchan, ulzzang multi-instrumentalist, is the second member of B.A.P who was introduced to the public through the Korean MTV program, "The Show" as MC. [4] And finally, on November 23, 2011, Zelo, the third member of B.A.P who was introduced to the public, was introduced as a member of the Bang & Zelo sub-unit with another member, Bang Yong Guk. [5] Currently they release the single "Never Give Up". [6]
question: When was the B.A.P boy band formed?
answers.text: 2011