Two children eating food.
Two brothers are eating food
Two children does not mean that the children are brothers.
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_eat(e1) & n_food(x3) & (x1 = x2) & n_child(x1) & card_eq_2(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_eat(e1) & n_food(x2) & n_brother(x1) & card_eq_2(x1))