 
 <translate> Context: The mass shooting occurred between 10: 05 and 10: 15 p.m. PDT on October 1, 2017 (the third and final night of the festival). When the shooting began, country music singer Jason Aldean was giving the closing performance in front of an audience of about 22,000.

Question: who was playing when the vegas shooting started?
Steam of consciousness below:
 <ibo> Ọgba aghara ahụ mere n'agbata elekere 10: 05 na 10: 15 nke abalị. PDT na Ọktọba 1, 2017 (abalị nke atọ na nke ikpeazụ nke ememme ahụ). Mgbe a malitere ịgba égbè ahụ, onye na-agụ egwú country bụ́ Jason Aldean nọ na-eme ihe ngosi mmechi n'ihu ihe dị ka mmadụ 22,000.  Ajụjụ: Ònye nọ na-egwu egwu mgbe ịgba égbè nke Vegas malitere? Steam nke ịmara n'okpuru: 