Original sentence: However, Alaska Airlines soon announced it would begin new routes to Austin from SJC and would upgrade service to Portland, Oregon,which was run by regional subsidary Horizon Air, to commercial jet service beginning September 2, 2009
Edited sentence: However, Alaska Airlines soon announced it would begin new routes to Austin from SJC and would upgrade service to Portland, Oregon,which was run by regional subsidiary Horizon Air, to commercial jet service beginning September 2, 2009