Complex sentence: His most cherished dream was to surpass West Bengal patriarch Jyoti Basu's record as the longest surviving chief minister of any state in the country was shattered, when he had no other alternatives but to resign after losing a trial of strength in the Arunachal Pradesh assembly.
Split into simpler sentences: His most cherished dream was to surpass West Bengal patriarch Jyoti Basu's record as the longest surviving chief minister of any state in the country. This was shattered, when he had no other alternatives but to resign after losing a trial of strength in the Arunachal Pradesh assembly.