Two boys in blue shirts wearing backpacks.
Two brothers in blue shirts wearing backpacks.
Just because two boys in blue shirts wearing backpacks doesn't mean they are brothers.
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & in(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_wear(e1) & n_backpack(x4) & (x2 = x3) & n_shirt(x2) & a_blue(s1) & Theme(s1,x2) & n_boy(x1) & card_eq_2(x1))
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & in(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_wear(e1) & n_backpack(x4) & (x2 = x3) & n_shirt(x2) & a_blue(s1) & Theme(s1,x2) & n_brother(x1) & card_eq_2(x1))