Two men are riding in a big yellow truck.
Two brothers are riding in a big yellow truck.
Two men can't be assumed to be brothers.
exists e1 s1 s2 x1 x2.(in(e1,x2) & n_truck(x2) & a_yellow(s2) & Theme(s2,x2) & a_big(s1) & Theme(s1,x2) & Actor(e1,x1) & v_ride(e1) & n_man(x1) & card_eq_2(x1))
exists e1 s1 s2 x1 x2.(in(e1,x2) & n_truck(x2) & a_yellow(s2) & Theme(s2,x2) & a_big(s1) & Theme(s1,x2) & Actor(e1,x1) & v_ride(e1) & n_brother(x1) & card_eq_2(x1))