<prompt> Write a continuation for this paragraph - Phakathi nokuqaliswa kwezombusazwe ezinamaqembu amaningi, uPoungui washiya i-PCT ngomhlaka-28 Novemba 1990 futhi waba ngumholi weqembu elisha, i-Union for Social Progress and Democracy UPSD. Ekupheleni kwempi yombango kaJune kuya ku-October 1997  <response>: , lapho umholi we-PCT uDenis Sassou Nguesso abuyela khona emandleni, uPoungui, njengomxhasi kaMongameli uPascal Lissouba, wabalekela ekudingisweni. Wahlala ekudingisweni kwaze kwaba ngo-2006. 