You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "The 2012–13 season was Aston Villa's 138th professional season; their 102nd season in the top-flight; and their 25th consecutive season in the top flight of English football, the Premier League, The club was managed by which Scottish professional football manager, and former player.?" whose answer is Paul Lambert.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Who was the manager of Aston Villa in 2012-13 season after Alex McLeish left?
Useful Output:

Doc 1: Manager, Martin O'Neill resigned 5 days before the new season began and  Alex McLeish as manager. McLeish was persuaded to join from
Doc 2: It was always going to be a gamble when Randy Lerner appointed Alex McLeish last summer. A year later, it is clear the gamble has failed. The
Doc 3: Lambert left his role as Norwich manager to take charge at Villa Park following the departure of Alex McLeish and the Scot is eager to turn
Doc 4: Norwich's ex-manager, Paul Lambert, has taken over at Aston Villa after the entirely justified dismissal of Alex McLeish, who spent a season
Doc 5: Goal.com: Aston Villa have sacked manager Alex McLeish after just one season in charge of the club. ClubCall: Wigan boss Roberto Martinez