two people build together.
They are building a box.
We don't know that the two people are building a box.
exists e1 s1 x1 x2.(a_together(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_build(e1) & n_thing(x2) & n_people(x1) & card_eq_2(x1))
exists e1 x1 x2.(n_thing(x1) & Theme(e1,x2) & Actor(e1,x1) & v_build(e1) & n_box(x2))