Children are running on a grass field.
Children running in a grassy field.
A grass field is grassy.
exists e1 x1 x2 x3.(on(e1,x2) & n_field(x2) & of(x2,x3) & n_grass(x3) & Actor(e1,x1) & v_run(e1) & n_child(x1))
exists e1 s1 x1 x2 x3.(a_topic(x1) & in(e1,x3) & n_field(x3) & a_grassy(s1) & Theme(s1,x3) & Actor(e1,x2) & v_run(e1) & (x1 = x2) & n_child(x1))