Complex sentence: In January 2004 Filippini moved to the second division with U.S. Città di Palermo, being crucial to the Sicilians' promotion, with 21 matches in only five months.
Split into simpler sentences: In January 2004, Filippini moved to the second division with U.S. Città di Palermo. He was crucial to the Sicilians' promotion, with 21 matches in only five months.