Lady walking through rows of children.
Few kids playing on the grass
The subject cannot change from a single lady to a few kids. The actions also cannot change as it cannot be a lady walking and kids playing at the same time.
exists s1 x1 x2 x3.(a_topic(x1) & through(x1,x2) & of(x2,x3) & n_child(x3) & n_row(x2) & n_walking(x1) & a_lady(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3.(n_grass(x3) & a_topic(x1) & on(e1,x3) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_kid(x1) & a_few(s1) & Theme(s1,x1))