A student walking on a sidewalk across campus.
The campus has sidewalks.
A student walking campus has sidewalks.
exists e1 x1 x2 x3 x4.(a_topic(x1) & across(e1,x4) & n_campus(x4) & on(e1,x3) & n_sidewalk(x3) & Actor(e1,x2) & v_walk(e1) & (x1 = x2) & n_student(x1))
exists e1 x1 x2.(n_campus(x1) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_sidewalk(x2))