Conversation so far:
Who is Tessa Jowell, David Mackenzie Donald Mills and Silvio Berlusconi?
Tessa Jowell was a British Labour politician.David Mackenzie Donald Mills is a British corporate lawyer.Silvio Berlusconi is an Italian media tycoon and politician.

Question: What has he done for Berlusconi?
Self-contained rewrite: What has David Mills done for Silvio Berlusconi?