A bad storm is slowing traffic on a busy city street.
The rain is making cars drive slower
there is never any mention of rain in sentence one. we can only assume there is snow maybe.
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 e1 p1 x1 x2.(n_rain(x1) & exists e2 s1.(a_slower(s1) & Manner(e2,s1) & Actor(e2,x2) & v_drive(e2)) & Recipient(e1,p1) & Actor(e1,x1) & Topic(e1,x2) & v_make(e1) & n_car(x2))