On June 23, a Solidarity Citizens' Parliamentary Club ("Obywatelski Klub Parliamentarny "Solidarność"") was formed, led by Bronisław Geremek. It formed a coalition with two ex-satellite parties of the PZPR — United People's Party and Democratic Party — which had now chosen to "rebel" against the PZPR, which found itself in the minority. On August 24, the Sejm elected Tadeusz Mazowiecki, a Solidarity representative, to be Prime Minister of Poland. Not only was he a first non-communist Polish Prime Minister since 1945, he became the first non-Communist prime minister in Eastern Europe for nearly 40 years. In his speech he talked about the "thick line" ("Gruba kreska") which would separate his government from the communist past By the end of August 1989, a Solidarity-led coalition government had been formed.