Complex sentence: His wife, Avadai Dhanam, died on 18 April 2005 in Hamilton, whilst Nair, who had developed severe dementia, died on 7 December of the same year as his wife in Hamilton, Canada.
Split into simpler sentences: His wife, Avadai Dhanam, died on 18 April 2005 in Hamilton. Whilst Nair, who had developed severe dementia died on 7 December of the same year as his wife in Hamilton, Canada.