Men standing with signs on the sidewalk.
the men are protesting
All signs are not protesting.
exists x1 x2 x3 x4.(n_sidewalk(x4) & a_topic(x1) & with(x1,x3) & on(x3,x4) & n_sign(x3) & n_standing(x1) & of(x1,x2) & n_man(x2))
exists e1 x1.(n_man(x1) & Actor(e1,x1) & v_protest(e1))