A black dog is swimming while carrying a tennis
A dog is swimming while carrying a racket.
Just because carrying a tennis does not mean it is a racket.
exists e1 e2 s1 x1 x2.(while(e1,e2) & Theme(e2,x2) & Actor(e2,x1) & v_carry(e2) & n_tennis(x2) & Actor(e1,x1) & v_swim(e1) & n_dog(x1) & a_black(s1) & Theme(s1,x1))
exists e1 e2 x1 x2.(while(e1,e2) & Theme(e2,x2) & Actor(e2,x1) & v_carry(e2) & n_racket(x2) & Actor(e1,x1) & v_swim(e1) & n_dog(x1))