People are walking along a dirt road.
The people are on vacation.
You can not infer they are on vacation.
exists e1 x1 x2 x3.(along(e1,x2) & n_road(x2) & of(x2,x3) & n_dirt(x3) & Actor(e1,x1) & v_walk(e1) & n_people(x1))
exists p1 x1.(n_people(x1) & exists x2.(on(x1,x2) & n_vacation(x2)))