A woman is playing a guitar on stage with a green background.
The woman is playing a concert in front of a large crowd.
Just because she's on stage doesn't make it a concert, nor does it imply she is in front of a large crowd.
exists e1 s1 x1 x2 x3 x4.(on(e1,x3) & with(x3,x4) & n_background(x4) & a_green(s1) & Theme(s1,x4) & n_stage(x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_guitar(x2) & n_woman(x1))
exists e1 s1 x1 x2 x3 x4.(n_woman(x1) & in(e1,x3) & of(x3,x4) & n_crowd(x4) & a_large(s1) & Theme(s1,x4) & n_front(x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_concert(x2))