Original sentence: "  In Orthodox confessions, the change is said to take place during the prayer of thanksgiving.The Catholic Church holds that the same change of the substance of the bread and of the wine occurs at the consecration of the Eucharist when the words are spoken "This is my body ... this is my blood
Edited sentence: The Catholic Church holds that the same change of the substance of the bread and of the wine occurs at the consecration of the Eucharist