Complex sentence: By 2008 Alstom had sold over 1750 of its Prima locomotives, on 20th May 2008 Alstom unveiled the second generation of Prima locomotives-named "Prima II".
Split into simpler sentences: By 2008 Alstom had sold 1750 of its Prima locomotives. On 20 May 2008 Alstom unveiled a second generation of Prima locomotives, named "Prima II".