People are walking in a line through a field of grass and dirt.
People are walking through grass and dirt toward a barn.
There is nothing to imply that people walking in a field are walking toward anything in particular, such as a barn.
exists e1 x1 x2 x3 x4 x5 x6.(through(e1,x3) & of(x3,x4) & n_dirt(x6) & n_grass(x5) & subset_of(x6,x4) & subset_of(x5,x4) & n_field(x3) & in(e1,x2) & n_line(x2) & Actor(e1,x1) & v_walk(e1) & n_people(x1))
exists e1 x1 x2 x3 x4 x5.(through(e1,x2) & toward(x2,x5) & n_barn(x5) & n_dirt(x4) & n_grass(x3) & subset_of(x4,x2) & subset_of(x3,x2) & Actor(e1,x1) & v_walk(e1) & n_people(x1))