A man is playing a guitar on stage.
a person is on a platform
A platform is also a stage.
exists e1 x1 x2 x3.(on(e1,x3) & n_stage(x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_guitar(x2) & n_man(x1))
exists p1 x1.(exists x2.(on(x1,x2) & n_platform(x2)) & n_person(x1))