In a motorcycle race a man's cycle has fallen over and there are riders coming in the background.
A man who fell over the cycle is in the lead.
It cannot be inferred that the man who fell over is in the lead.
exists e1 p1 s1 x1 x2 x3 x4 x5 x8.(n_background(x8) & exists e2 x6 x7.((x5 = x6) & in(e2,x8) & Actor(e2,x7) & v_come(e2) & (x6 = x7) & n_rider(x6)) & in(e1,x3) & n_race(x3) & of(x3,x4) & n_motorcycle(x4) & a_over(s1) & Manner(e1,s1) & Actor(e1,x2) & v_fall(e1) & n_cycle(x2) & of(x2,x1) & n_man(x1))
exists e1 p1 x1 x2 x3 x4.(n_lead(x4) & n_cycle(x3) & in(x1,x4) & over(e1,x3) & Actor(e1,x2) & v_fall(e1) & (x1 = x2) & n_man(x1))