Person observing a river with a bridge going over it.
A blind man near a river
The person can't be blind if they're observing.
exists e1 e2 x1 x2 x3 x4.(ne_nam_person(x1) & with(e1,x3) & over(e2,x2) & n_thing(x2) & Actor(e2,x4) & v_go(e2) & (x3 = x4) & n_bridge(x3) & Theme(e1,x2) & Actor(e1,x1) & v_observe(e1) & n_river(x2))
exists s1 x1 x2.(a_topic(x1) & near(x1,x2) & n_river(x2) & n_man(x1) & a_blind(s1) & Theme(s1,x1))