Complex sentence: In November, 1946, Karol is ordained to the priesthood by Sapieha, who is now a cardinal since February of that year, then travels to Rome for his graduate studies and returns to Poland in 1948 for his first pastoral assignment in Niegowic.
Split into simpler sentences: In November, 1946, Karol is ordained to the priesthood by Sapieha, who is now a cardinal since February of that year. Wojtyla then travels to Rome for his graduate studies and returns to Poland in 1948 for his first pastoral assignment in Niegowic.