A woman and a girl sit by a tree-shaded creek.
Beside the creek is a mighty Oak tree.
Nothing says there is a mighty Oak tree.
exists e1 s1 x1 x2 x3 x4.(by(e1,x4) & n_creek(x4) & a_tree-shaded(s1) & Theme(s1,x4) & Actor(e1,x1) & v_sit(e1) & subset_of(x3,x1) & n_girl(x3) & subset_of(x2,x1) & n_woman(x2))
exists p1 p2 p3 x1.(n_creek(x1) & exists x4.n_event(x4) & exists p4 s1 x2 x3.((x1 = x2) & n_tree(x2) & (x2 = x3) & ne_geo_oak(x3) & a_mighty(s1) & Theme(s1,x2)) & beside(p2,p3))