Complex sentence: Other candidates had been Valerio Valeri, Alfredo Ottaviani, Ernesto Ruffini, and the Catholic Armenian Patriarch of Cilicia, Gregorio Pietro Agagianian non-Italian heritage and young age (63) greatly hindered his chances for election.
Split into simpler sentences: Other candidates had been Valerio Valeri, Alfredo Ottaviani, Ernesto Ruffini, and the Catholic Armenian Patriarch of Cilicia, Gregorio Pietro Agagianian. However, Agagianian's non-Italian heritage and young age (63) greatly hindered his chances for election.