The shadows of trees are projected onto the field by the sun.
The trees are blocking the sun.
Shadows can be created when a tree is blocking the sun.
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 e1 x1 x2.(n_sun(x2) & n_tree(x1) & Theme(e1,x2) & Actor(e1,x1) & v_block(e1))