A group of people are picking up trash on a beach.
Tall people on a beach.
Not all people are tall.
exists e1 s1 x1 x2 x3 x4.(on(e1,x4) & n_beach(x4) & a_up(s1) & Manner(e1,s1) & Theme(e1,x3) & Actor(e1,x1) & v_pick(e1) & n_trash(x3) & of(x1,x2) & n_people(x2) & n_group(x1))
exists x1 x2 x3.(a_topic(x1) & on(x1,x3) & n_beach(x3) & n_people(x1) & (x1 = x2) & ne_nam_tall(x2))