An envelope http://www.ohword.com/customessays/ deconstructing musical theatre an essay  Private equity firms Blackstone Group LP, BC PartnersLtd, Warburg Pincus LLC, Hellman & Friedman LLC and AdventInternational Corp are through to the second round of bidding,sources told Reuters previously. Onex Corp is anotherbuyout firm involved in the process, people familiar with thematter said this week.