Original sentence: On July 17, 2009, it was announced that Rogers Cable will replace WQLN of Erie, Pennsylvania and WPBS-TV of Watertown, New York with WTVS on its London and Ottawa-area systems, effective August 18, 2009.The change in Ottawa was later rescinded on July 30, when Rogers announced that they will now receive WPBS via fiber optics.The fate of WQLN remains unknown.WTVS was carried by the Cancom system from 1983 as the PBS signal for Canadian cable television systems too distant to receive a border station over-the-air
Edited sentence: WTVS was carried by the Cancom system since 1983 as the PBS signal for Canadian cable television systems too distant to receive a border station over-the-air