Walking home on a cold winters day.
The air is cold.
Cold winter day is a generally when the air is cold.
exists e1 s1 x1 x2 x3 x4.(on(e1,x3) & n_day(x3) & of(x3,x4) & n_winter(x4) & a_cold(s1) & Theme(s1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_home(x2) & n_thing(x1))
exists s1 x1.(n_air(x1) & Theme(s1,x1) & a_cold(s1))