what are the names of all the performers?
avicii, bruce springsteen, avicii
of these performers, what are all the weeks that ed sheeran have a number 1 hit in?
17 january 2014, 24 january 2014, 31 january 2014, 7 february 2014, 14 february 2014, 21 february 2014, 28 february 2014
of these weeks, which is the first week ed sheeran had a number 1 hit in?
17 january 2014