Original: Finally, by order of Leo XIII, in his encyclical Annum Sacrum (May 25, 1899), as well as on June 11, he consecrated every human to the Sacred Heart.
Simplified: Finally, by order of Leo XIII, in his encyclical "Annum Sacrum" (May 25, 1899), as well as on June 11, he consecrated every human to the Sacred Heart.