Complex sentence: Their final and perhaps greatest coup was their decisive role in the takeover of Telecom Italia by Olivetti and Roberto Colannino, where against all odds the transformational deal was decided by the narrowest of margins with 51% of shareholders voting in favour of the deal.
Split into simpler sentences: Their final and perhaps greatest coup was their decisive role in the takeover of Telecom Italia by Olivetti and Roberto Colannino. The deal was decided by the narrowest of margins with 51% of shareholders voting in favour of the deal.