Complex sentence: The Mayoress of Wigan is the title traditionally given to the wife of the current Mayor of Wigan in office, The Mayoress attends engagements whilst also being the hostess at functions organised by the Mayor.
Split into simpler sentences: The Mayoress of Wigan is the title traditionally given to the wife of the current Mayor of Wigan in office. As the first lady in Wigan, the mayoress attends engagements whilst also being the hostess at functions organised by the Mayor.