He was the leader of the main opposition Sierra Leone People 's Party ( SLPP ) to 2013 .
John Oponjo Benjamin ( born 29 November 1952 in Segbwema , Kailahun District ) is a Sierra Leonean economist and politician of Mende descent .
John Oponjo Benjamin was the economist of the main opposition Sierra Leone People 's Party ( SLPP ) to 2013 .
John Oponjo Benjamin ( born 29 November 1952 in Segbwema , Kailahun District ) is a Sierra Leonean economist and politician of Mende descent .