Complex sentence: In 2007 Tommi Prodi was back in the band replacing guitarist Luca Carpi and in 2008 Marco Massarenti was back in the band replacing bassist Alessandro Ronchini.
Split into simpler sentences: In 2007 Tommi Prodi was back in the band replacing guitarist Luca Carpi. In 2008 Marco Massarenti was back in the band replacing bassist Alessandro Ronchini.