The woman is walking on a rickety narrow bridge.
There is a man walking on the street.
there can either be a woman or a man
exists e1 s1 s2 x1 x2.(n_woman(x1) & on(e1,x2) & n_bridge(x2) & a_narrow(s2) & Theme(s2,x2) & a_rickety(s1) & Theme(s1,x2) & Actor(e1,x1) & v_walk(e1))
exists p1 x1 x4.(n_street(x4) & exists e1 x2 x3.((x1 = x2) & on(e1,x4) & Actor(e1,x3) & v_walk(e1) & (x2 = x3) & n_man(x2)))