One man plays guitar while another plays the drums on a stage.
a group of man in a musical band are performing on stage
A group of men are playing music on a stage.
exists e1 p1 x1 x2 x4.(n_drum(x4) & exists e2 x3 x5.(on(e2,x5) & n_stage(x5) & Theme(e2,x4) & Actor(e2,x3) & v_play(e2) & n_thing(x3)) & while(e1,p1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_guitar(x2) & n_man(x1) & card_eq_1(x1))
exists e1 s1 x1 x2 x3 x4.(on(e1,x4) & n_stage(x4) & Actor(e1,x1) & v_perform(e1) & in(x1,x3) & n_band(x3) & a_musical(s1) & Theme(s1,x3) & of(x1,x2) & n_man(x2) & n_group(x1))