Premise: Tsewang Rigzin is the current president of the Tibetan Youth Congress. He has held the position since September 2007, and on August 8, 2008 he was re-elected to serve through August 2013. Prior to attaining his current position he served as the president of the Portland/Vancouver regional chapter of the Tibetan Youth Congress.
Hypothesis: Tsewang Rigzin was previously involved as the president of the Portland/Vancouver regional chapter of the Tibetan Youth Congress.