Complex sentence: On 28--29 April 2006, Levi-Montalcini, aged 97, attended the opening assembly of the newly-elected Senate, at which the President of the Senate was elected; she declared her preference for the centre-left candidate Franco Marini.
Split into simpler sentences: On 28--29 April 2006, Levi-Montalcini, aged 97, attended the opening assembly of the newly-elected Senate, at which the President of the Senate was elected. She declared her preference for the centre-left candidate Franco Marini.