Two children are petting a calf.
Two children are petting a calf that won the prize
A calf being petted by children may not have won any prize.
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_pet(e1) & n_calf(x2) & n_child(x1) & card_eq_2(x1))
exists e1 e2 x1 x2 x3 x4.(n_prize(x4) & Theme(e2,x2) & Actor(e2,x1) & v_pet(e2) & Theme(e1,x4) & Actor(e1,x3) & v_win(e1) & (x2 = x3) & n_calf(x2) & n_child(x1) & card_eq_2(x1))