A cathedral overlooks a river which is spanned by a traffic bridge and traveled upon by small craft.
The traffic bridge is traveled upon by small crafts because of it's location on the water.
The traffic bridge may be travelled upon for many reasons other than its location on the water.
exists e3 e2 e1 s1 x1 x2 x3 x4 x5 x6 x7.(Theme(e3,x2) & Actor(e3,x1) & v_overlook(e3) & Actor(e2,x7) & n_craft(x7) & a_small(s1) & Theme(s1,x7) & upon(e2,x6) & (x2 = x6) & v_travel(e2) & Actor(e1,x4) & n_bridge(x4) & of(x4,x5) & n_traffic(x5) & Theme(e1,x3) & v_span(e1) & (x2 = x3) & n_river(x2) & n_cathedral(x1))
exists e1 p1 s1 x1 x2 x3 x4 x6.(n_water(x6) & n_thing(x1) & n_bridge(x1) & of(x1,x2) & n_traffic(x2) & exists x5.((x1 = x5) & on(x5,x6) & n_location(x5)) & of(e1,x1) & r_because(e1) & Actor(e1,x4) & n_craft(x4) & a_small(s1) & Theme(s1,x4) & upon(e1,x3) & (x1 = x3) & v_travel(e1))