Complex sentence: On 4 November 2017, Drahoš attacked Mirek Topolánek, who had announced his candidacy that day, describing Topolánek as similar to Miloš Zeman and calling his candidacy a bad joke.
Split into simpler sentences: On 4 November 2017, Drahoš attacked Mirek Topolánek who has announced his candidacy on the same day. Drahoš stated that Topolánek similar to Miloš Zeman and called his candidacy a bad joke.