People walking on a street.
They run in a field
You can not be walking while you run you can do either one or the other.
exists e1 x1 x2 x3.(a_topic(x1) & on(e1,x3) & n_street(x3) & Actor(e1,x2) & v_walk(e1) & (x1 = x2) & n_people(x1))
exists e1 x1.(in(e1,x1) & n_field(x1) & Actor(e1,x1) & v_run(e1) & n_thing(x1))