an african man is performing a trick with a stick that is burning with fire at both ends.
an african man is not performing a trick with a stick.
The man either is or is not performing a trick, not both.
exists e2 e1 s1 x1 x2 x3 x4 x5 x6.(n_end(x6) & with(e1,x3) & at(e2,x6) & with(e2,x5) & n_fire(x5) & Actor(e2,x4) & v_burn(e2) & (x3 = x4) & n_stick(x3) & Theme(e1,x2) & Actor(e1,x1) & v_perform(e1) & n_trick(x2) & n_man(x1) & a_african(s1) & Theme(s1,x1))
exists s1 x1.(-exists e1 x2 x3.(with(e1,x3) & n_stick(x3) & Theme(e1,x2) & Actor(e1,x1) & v_perform(e1) & n_trick(x2)) & n_man(x1) & a_african(s1) & Theme(s1,x1))