Two boys are talking while one is sitting on a mule.
Two boys, one standing and the other on a mule, are talking about who is going to win the race.
It cannot be inferred that the boys are talking about winning the race.
exists e1 p1 x1.(exists e2 x2 x3.(on(e2,x3) & n_mule(x3) & Actor(e2,x2) & v_sit(e2) & n_thing(x2) & card_eq_1(x2)) & while(e1,p1) & Actor(e1,x1) & v_talk(e1) & n_boy(x1) & card_eq_2(x1))
exists e1 x1 x2 x3 x4 x5 x7.(n_race(x7) & n_other(x4) & exists e2 p1 x6.(n_thing(x6) & about(e1,e2) & Topic(e2,p1) & Actor(e2,x6) & v_go(e2) & exists e3.(Theme(e3,x7) & Actor(e3,x6) & v_win(e3))) & Actor(e1,x1) & v_talk(e1) & rel(x1,x2) & subset_of(x4,x2) & on(x4,x5) & n_mule(x5) & subset_of(x3,x2) & n_standing(x3) & card_eq_1(x3) & n_boy(x1) & card_eq_2(x1))