People happily walking along a street with palm trees in the background.
The people are on vacation.
Not all people walking with palm trees in the background are on vacation.
exists e1 s1 x1 x2 x3 x4 x5 x6.(n_background(x6) & a_topic(x1) & with(e1,x4) & in(x4,x6) & n_tree(x4) & of(x4,x5) & n_palm(x5) & a_happily(s1) & Manner(e1,s1) & along(e1,x3) & n_street(x3) & Actor(e1,x2) & v_walk(e1) & (x1 = x2) & n_people(x1))
exists p1 x1.(n_people(x1) & exists x2.(on(x1,x2) & n_vacation(x2)))