Two men with children on their shoulders.
Two men carrying their sons
Sentence two may be talking about different men.
exists x1 x2 x3.(a_topic(x1) & on(x1,x3) & n_shoulder(x3) & of(x3,x1) & n_thing(x1) & with(x1,x2) & n_child(x2) & n_man(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_carry(e1) & n_son(x3) & of(x3,x1) & n_thing(x1) & (x1 = x2) & n_man(x1) & card_eq_2(x1))