Complex sentence: He was made an archbishop on 3 January 1961, when Semarang was elevated to an ecclesiastical province at the time he was in Europe participating in the first session of the Second Vatican Council.
Split into simpler sentences: He was made an archbishop on 3 January 1961, when Semarang was elevated to an ecclesiastical province. At the time he was in Europe, participating in the first session of the Second Vatican Council.