Conversation so far:
what did each of the big four really want in the peace conference
what were the names of the big four
The Big Four were French Prime Minister Georges Clemenceau, British Prime Minister David Lloyd George, US President Woodrow Wilson, and Italian Prime Minister Vittorio Emanuele Orlando.
when did the paris peace conference start
the paris peace conference began on 18 January 1919

Question: how many countries participated
Self-contained rewrite: how many countries participated in the paris peace conference