Two men wearing black t-shirts are sitting on the back of a truck.
Two men are riding to the field in the truck.
Two men sitting in truck need not be riding to the field.
exists e1 e2 s1 x1 x2 x3 x4 x5.(n_back(x4) & on(e2,x4) & of(x4,x5) & n_truck(x5) & Actor(e2,x1) & v_sit(e2) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_t-shirt(x3) & a_black(s1) & Theme(s1,x3) & (x1 = x2) & n_man(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(n_truck(x3) & n_field(x2) & in(e1,x3) & to(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_man(x1) & card_eq_2(x1))