Complex sentence: He was a longstanding member of the editorial board of the Jane Austen Society of Australia, became an Australian citizen in May 2011 and died at his Sydney home in Double Bay in June 2011.
Split into simpler sentences: He was a member of the editorial board of the Jane Austen Society of Australia. He became an Australian citizen in May 2011 and died at his Sydney home in Double Bay in June 2011.