Complex sentence: In 1989, Nemtsov unsuccessfully ran for the Soviet Congress of People's Deputies on a platform of reform which for the time was quite radical, promoting ideas such as multiparty democracy and private enterprise.
Split into simpler sentences: In 1989, Nemtsov ran for the Soviet Congress of People's Deputies. He ran on a platform of reform which for the time was quite radical; promoting ideas such as multiparty democracy and private enterprise.