A man is walking in front of a bunch of protesting signs and on the right of the photo there are protesters.
the man thinking about joining the protest but has no sign
The man may or may not be thinking about joining the protest. It's not necessarily true that the man has no sign.
exists e1 e3 e2 p1 x1 x2 x3 x4 x5 x6 x7 x8.(n_photo(x8) & n_right(x7) & on(e3,x7) & of(x7,x8) & exists p2 x9 x10.((x9 = x10) & n_protester(x10)) & that(x8,p1) & Actor(e3,x6) & v_walk(e3) & n_man(x6) & in(e1,x2) & of(x2,x3) & Theme(e2,x5) & Actor(e2,x4) & v_protest(e2) & n_sign(x5) & (x3 = x4) & n_bunch(x3) & n_front(x2) & Actor(e1,x1) & v_walk(e1) & n_man(x1))
exists e1 e2 x1 x2 x3 x4 x5.(n_man(x1) & n_protest(x4) & a_topic(x1) & -exists e3 x6.(Theme(e3,x6) & Actor(e3,x5) & v_have(e3) & n_sign(x6)) & (x1 = x5) & about(e1,e2) & Theme(e2,x4) & Actor(e2,x3) & v_join(e2) & Actor(e1,x2) & v_think(e1) & (x1 = x2))