A man is playing a guitar on the sidewalk.
The man is sitting
A man can play a guitar without sitting.
exists e1 x1 x2 x3.(n_sidewalk(x3) & on(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_guitar(x2) & n_man(x1))
exists e1 x1.(n_man(x1) & Actor(e1,x1) & v_sit(e1))