A man is on stage singing, while the band plays behind him.
A man is surrounded by people.
Man singing on stage will be surrounded by people, as he is performing.
exists p1 p2 x1 x4.(n_male(x4) & n_band(x4) & exists e1.(behind(e1,x4) & Actor(e1,x4) & v_play(e1)) & while(p1,p2) & exists x2 x3.(on(x1,x2) & n_singing(x2) & of(x2,x3) & n_stage(x3)) & n_man(x1))
exists e1 x1 x2.(Actor(e1,x2) & n_people(x2) & Theme(e1,x1) & v_surround(e1) & n_man(x1))