A young boy is walking in a grassy field.
a field is being walked on
the field is being walked on by the young boy
exists e1 s1 s2 x1 x2.(in(e1,x2) & n_field(x2) & a_grassy(s2) & Theme(s2,x2) & Actor(e1,x1) & v_walk(e1) & n_boy(x1) & a_young(s1) & Theme(s1,x1))
exists e1 s1 x1.(a_on(s1) & Manner(e1,s1) & Theme(e1,x1) & v_walk(e1) & n_field(x1))