A man playing a guitar on stage while a man plays drums in the background.
A local band playing on stage in front of a sold out crowd.
Just because a man is playing a guitar and another man plays drums it does not mean they are a local band playing on stage.
exists e1 e2 x1 x2 x3 x4 x5 x6 x7.(n_background(x7) & in(e2,x7) & Theme(e2,x6) & Actor(e2,x1) & v_play(e2) & n_drum(x6) & while(e1,x5) & n_man(x5) & on(e1,x4) & n_stage(x4) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_guitar(x3) & (x1 = x2) & n_man(x1))
exists e1 e2 s1 s2 x1 x2 x3 x4 x5 x6.(a_out(s2) & Manner(e2,s2) & Theme(e2,x6) & Actor(e2,x1) & v_sell(e2) & n_crowd(x6) & in(e1,x4) & of(x4,x5) & n_a(x5) & n_front(x4) & on(e1,x3) & n_stage(x3) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_band(x1) & a_local(s1) & Theme(s1,x1))