A man and woman are holding a sign that reads, "Teaching Children for peace".
A married couple holding a sign
A man and woman holding a sign does not mean they are a married couple.
exists e3 e1 e2 x1 x2 x3 x4 x5 x6 x7.(for(e2,e3) & for(e3,x7) & n_peace(x7) & Theme(e3,x6) & Actor(e3,x1) & v_teach(e3) & n_child(x6) & Theme(e2,x4) & Actor(e2,x1) & v_hold(e2) & Actor(e1,x5) & v_read(e1) & (x4 = x5) & n_sign(x4) & n_woman(x3) & n_man(x2) & subset_of(x3,x1) & subset_of(x2,x1))
exists e1 s1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_hold(e1) & n_sign(x3) & (x1 = x2) & n_couple(x1) & a_married(s1) & Theme(s1,x1))