A man performing a dancing act surrounded by people.
The man is a street performer.
A man performing while surrounded by people does not imply the man is a street performer.
exists e2 e1 x1 x2 x3 x4 x5.(Actor(e2,x5) & n_people(x5) & Theme(e2,x1) & v_surround(e2) & Theme(e1,x3) & Actor(e1,x2) & v_perform(e1) & n_act(x3) & of(x3,x4) & n_dancing(x4) & (x1 = x2) & n_man(x1))
exists p1 x1.(n_man(x1) & exists x2 x3.((x1 = x2) & n_performer(x2) & of(x2,x3) & n_street(x3)))