A woman sits in a subway station.
The woman is sitting down.
sits and sitting down describe the same action.
exists e1 x1 x2 x3.(in(e1,x2) & n_station(x2) & of(x2,x3) & n_subway(x3) & Actor(e1,x1) & v_sit(e1) & n_woman(x1))
exists e1 s1 x1.(n_woman(x1) & a_down(s1) & Manner(e1,s1) & Actor(e1,x1) & v_sit(e1))