Detailed Instructions: In this task you are given a question. You need to generate an answer to the question.
Q: 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?
A:
Alexander Aizenshtat