Complex sentence: An alliance between the SLD and the Polish People's Party ruled Poland in the years 1993--1997, however the coalition was defeated by the right-wing Solidarity Electoral Action in the 1997 election.
Split into simpler sentences: An alliance between the SLD and the Polish People's Party ruled Poland in the years 1993--1997. However the coalition was defeated by the right-wing Solidarity Electoral Action in the 1997 election.