Complex sentence: On May 9,2008, Montgomery announced that he was in rehab for an undisclosed substance abuse problem; he sought rehab at a drug-treatment facility in Hazard, KY.
Split into simpler sentences: On May 9,2008, Montgomery announced he was in rehab for an undisclosed substance abuse problem. Although not released at the time he sought rehab at a drug treatment facility in Hazard, KY.