Two men in a room doing construction.
Nobody is doing constructing
Two men can be either doing construction or not doing construction.
exists e1 x1 x2 x3 x4.(a_topic(x1) & in(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_do(e1) & n_construction(x4) & (x2 = x3) & n_room(x2) & n_man(x1) & card_eq_2(x1))
-exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_construct(x2) & n_person(x1))