A lady is in a wheelchair on the corner of a street, and a man in a white shirt is about to cross the street.
A man in a white shirt crosses the street while a lady in a wheelchair waits for the signal before crossing.
The fact that a lady waits on the street corner to cross does not imply she waits for the signal.
exists p1 p2 s1 s2 x1 x2 x3 x5 x7.(n_street(x7) & n_corner(x5) & Topic(s2,p2) & Actor(s2,x2) & a_about(s2) & exists e1.(Theme(e1,x7) & Actor(e1,x2) & v_cross(e1)) & in(x2,x3) & n_shirt(x3) & a_white(s1) & Theme(s1,x3) & n_man(x2) & exists x4 x6.(in(x1,x4) & on(x4,x5) & of(x5,x6) & n_street(x6) & n_wheelchair(x4)) & n_lady(x1))
exists e1 e2 s1 x1 x2 x3 x4 x5 x6 x7.(n_signal(x7) & n_street(x3) & before(e1,e2) & Actor(e2,x1) & v_cross(e2) & for(e1,x7) & while(e1,x4) & in(x4,x5) & n_wait(x5) & of(x5,x6) & n_wheelchair(x6) & n_lady(x4) & Theme(e1,x3) & Actor(e1,x1) & v_cross(e1) & in(x1,x2) & n_shirt(x2) & a_white(s1) & Theme(s1,x2) & n_man(x1))