Complex sentence: Australian Rules football was also a big part of Ponting's sporting life; during winter he played junior football for North Launceston and up until he was 14, it could have become a possible sporting option.
Split into simpler sentences: Australian Rules football was also a big part of Ponting's sporting life. During the winter he played junior football for North Launceston and up until he was 14, it could have become a possible sporting option.