A man protests in support of a cause.
A man supports nothing.
protests and supports are opposites
exists x1 x2 x3 x4.(a_topic(x1) & in(x1,x3) & of(x3,x4) & n_cause(x4) & n_support(x3) & n_protest(x1) & of(x1,x2) & n_man(x2))
exists x1.(-exists e1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_support(e1) & n_thing(x2)) & n_man(x1))