A man and a boy standing in front of a sign that says "HELL".
A man and boy are standing behind a sign.
Man and boy cannot being standing in front and behind a sign.
exists e1 s1 x1 x2 x3 x4 x5 x6 x7.(ne_nam_hell(x7) & a_topic(s1) & subset_of(x2,s1) & in(x2,x4) & of(x4,x5) & Theme(e1,x7) & Actor(e1,x6) & v_say(e1) & (x5 = x6) & n_sign(x5) & n_front(x4) & n_standing(x2) & of(x2,x3) & n_boy(x3) & subset_of(x1,s1) & n_man(x1))
exists e1 x1 x2 x3 x4.(behind(e1,x4) & n_sign(x4) & Actor(e1,x1) & v_stand(e1) & n_boy(x3) & n_man(x2) & subset_of(x3,x1) & subset_of(x2,x1))