Task: Question Answering
Input (English): Question:After the murder of his children's nanny, Sandra Rivett, Richard John Bingham disappeared on 8 November 1974, was presumed deceased on 11 December 1992 and declared legally dead in October 1999. By what name is he better known? ,  Options: [A.Richard Bingham B.Alexander Aizenshtat] 
Output (English): B