Original sentence: He has since announced his candidacy for the February 20, 2008 Presidential election.He instead devoted his time to scientific research.He was forced to step down in February 1998 after advocating concessions to Azerbaijan in the resolution of the conflict over Nagorno-Karabakh which many Armenians regarded as undermining their security.On October 26, 2007 Ter-Petrossian made his first public speech in almost a decade criticizing the current authorities with charges of corruption.Since his resignation, Ter-Petrossian rarely appeared in public and avoided contact with the media, although there were speculations that he would run for the office of president of Armenia in the general election in February 2003.Ter-Petrossian's key ministers, led by then-Prime Minister Robert Kocharyan, refused to accept a peace plan for Karabakh put forward by international mediators in September 1997.That agreement was to accompany the return of most Armenian-controlled Azerbaijani territories around Karabakh and the lifting of the Azerbaijani and Turkish blockades of Armenia.The plan, accepted by Ter-Petrossian and Azerbaijan, called for a "phased" settlement of the conflict which would postpone an agreement on Karabakh's status, the main stumbling block
Edited sentence: He has since announced his candidacy for the February 2008 Presidential election.He instead has devoted his time to scientific research.On October 26th Ter-Petrossian made his first public speech in almost a decade blasting the current authorities with charges of corruption and calling Armenia's leaders "mafiosos".Since his resignation, Ter-Petrossian has rarely appeared in public and has studiously avoided contact with the media, although there was speculation that he would run for president of Armenia in the last general election in February 2003