two boys in uniforms exchanging an item
The boys are interacting with each other.
The boys in uniforms are the boys who are interacting.
exists e1 x1 x2 x3 x4.(a_topic(x1) & in(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_exchange(e1) & n_item(x4) & (x2 = x3) & n_uniform(x2) & n_boy(x1) & card_eq_2(x1))
exists e1 x1.(n_boy(x1) & all x2.(n_other(x2) -> with(e1,x2)) & Actor(e1,x1) & v_interact(e1))