Conversation so far:
What charity work did Ian McKellen do?
McKellen appeared in a series of TV advertisements to support Age UK
Were the advertisements Ian McKellen did for Age UK a success?
Did Ian McKellen do any other charity work, besides the advertisements for Age UK?
McKellen umpired in March 2011 for a charity cricket match in New Zealand to support earthquake victims of the February 2011 Christchurch earthquake
Did Ian McKellen do any other charity work, besides the advertisements for Age UK and and the charity cricket match?
McKellen also has a history of supporting individual theatres

Question: Where were the theaters located?
Self-contained rewrite: Where were the theaters that Ian McKellan supported located?