sentences:  (PMH) bought the paper in 2006, Brian P. Tierney and the business people behind PMH signed a pledge promising that they would not influence the content of the paper.Tierney, a Republican activist who had represented many local groups in the Philadelphia area, had criticized "The Inquirer" in the past on behalf of his clients.One of Tierney's clients had been the Roman Catholic Archdiocese of Philadelphia, which he had represented during the Cipriano affair.