A bad storm is slowing traffic on a busy city street.
There is a lot of traffic and overcast clouds.
We can't assume there is an overcast and there usually isn't a bad storm with only overcast.
exists e1 s1 s2 x1 x2 x3 x4.(Theme(e1,x2) & Actor(e1,x1) & v_slow(e1) & on(x2,x3) & n_street(x3) & of(x3,x4) & n_city(x4) & a_busy(s2) & Theme(s2,x3) & n_traffic(x2) & n_storm(x1) & a_bad(s1) & Theme(s1,x1))
exists p1 x1 s1 x2 x3 x4 x5.((x1 = x2) & of(x2,x3) & subset_of(x5,x3) & n_cloud(x5) & a_overcast(s1) & Theme(s1,x5) & subset_of(x4,x3) & n_traffic(x4) & n_lot(x2))