A woman stretches to reach across water.
A woman is stretching.
Just because a woman stretches to reach across water doesn't imply a woman is currently stretching.
exists e1 p1 x1.(Topic(e1,p1) & Actor(e1,x1) & v_stretch(e1) & exists e2 x2.(across(e2,x2) & n_water(x2) & Actor(e2,x1) & v_reach(e2)) & n_woman(x1))
exists e1 x1.(Actor(e1,x1) & v_stretch(e1) & n_woman(x1))