The shadows of trees are projected onto the field by the sun.
There are birds in the tree.
There do not have to be birds in the trees for them to project shadows.
exists e1 x1 x2 x3 x4.(n_sun(x4) & n_field(x3) & n_shadow(x1) & Actor(e1,x4) & onto(e1,x3) & Theme(e1,x1) & v_project(e1) & of(x1,x2) & n_tree(x2))
exists p1 x1 x2.(n_tree(x2) & in(p1,x2) & exists x3.((x1 = x3) & n_bird(x3)))