Conversation so far:
How did Boris die?
23 April 2007.
what caused his death?
congestive heart failure.
where was his funeral?
had lain in repose in the Cathedral of Christ the Saviour in Moscow.
how many people attended?
CANNOTANSWER.

Question: what else happened during his funeral?
Self-contained rewrite: What else happened other than Boris Yeltsin being laid in the Cathedral of Christ the Saviour in Moscow during the funeral?