There are four people dressed in orange clothes walking down the street.
The street is empty
The street cannot be empty is there are four people dressed in orange clothes walking down the street.
exists p1 x1 x7.(n_street(x7) & exists e2 e1 x2 x3 x4 x5 x6.((x1 = x2) & in(e1,x4) & down(e2,x7) & Actor(e2,x6) & v_walk(e2) & (x4 = x6) & n_clothes(x4) & of(x4,x5) & n_orange(x5) & Theme(e1,x3) & v_dress(e1) & (x2 = x3) & n_people(x2) & card_eq_4(x2)))
exists s1 x1.(n_street(x1) & Theme(s1,x1) & a_empty(s1))