A man wearing sunglasses holds a sign at a demonstration.
A man in sunglasses on a picket line.
Just because A man wearing sunglasses holds a sign at a demonstration does not indicate that A man in sunglasses on a picket line.
exists e1 e2 x1 x2 x3 x4 x5.(at(e2,x5) & n_demonstration(x5) & Theme(e2,x4) & Actor(e2,x1) & v_hold(e2) & n_sign(x4) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_sunglass(x3) & (x1 = x2) & n_man(x1))
exists x1 x2 x3 x4.(a_topic(x1) & in(x1,x2) & on(x2,x3) & n_line(x3) & of(x3,x4) & n_picket(x4) & n_sunglass(x2) & n_man(x1))