A woman posing for a picture by the lake.
A woman sitting by the lake.
A woman posing for a picture by the lake doesn't mean that she is sitting.
exists e1 x1 x2 x3 x4.(n_lake(x4) & a_topic(x1) & for(e1,x3) & by(x3,x4) & n_picture(x3) & Actor(e1,x2) & v_pose(e1) & (x1 = x2) & n_woman(x1))
exists e1 x1 x2 x3.(n_lake(x3) & a_topic(x1) & by(e1,x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_woman(x1))