The number 2 dog in the blue vest is in the lead at the dog races.
Some puppies are racing in the championship.
Dog races does not necessarily mean racing in the championship.
exists p1 s1 x1 x2 x3 x4 x5.(n_race(x5) & of(x5,x1) & n_dog(x1) & n_dog(x1) & n_lead(x4) & n_vest(x3) & a_blue(s1) & Theme(s1,x3) & n_date(x1) & a_date_day_02(x1) & a_date_day_02(x1) & of(x1,x2) & n_number(x2) & in(x1,x4) & at(x4,x5) & in(x1,x3))
exists e1 x1 x2.(n_championship(x2) & in(e1,x2) & Actor(e1,x1) & v_race(e1) & n_puppy(x1))