Two little boys and their mom smiling on the outside of a window.
The family is on vacation.
You can not infer they are on vacation.
exists e1 s1 s2 x1 x2 x3 x4 x5.(n_outside(x4) & a_topic(s1) & subset_of(x2,s1) & on(e1,x4) & of(x4,x5) & n_window(x5) & Actor(e1,x3) & v_smile(e1) & (x2 = x3) & n_mom(x2) & of(x2,x1) & n_thing(x1) & subset_of(x1,s1) & n_boy(x1) & a_little(s2) & Theme(s2,x1) & card_eq_2(x1))
exists p1 x1.(n_family(x1) & exists x2.(on(x1,x2) & n_vacation(x2)))