Complex sentence: He was finally elected as Labour's Mayoral candidate by Tower Hamlets Borough Labour Party members receiving 433 votes, compared to John Biggs with 251 votes and Helal Abbas with 157 votes.
Split into simpler sentences: He was finally elected as Labour's Mayoral candidate by Tower Hamlets Borough Labour Party members. He received 433 votes, to John Biggs with 251 votes and Helal Abbas with 157 votes.