Complex sentence: The Scottish Parliament constituency of Ayr, which was created in 1999: the boundaries of which remained the same as that of the former Ayr constituency until the 2011 First Periodic Review of Scottish Parliament Boundaries.
Split into simpler sentences: The Scottish Parliament constituency of Ayr, was created in 1999. The boundaries of the constituency remained the same as that of the former Ayr constituency until the 2011 First Periodic Review of Scottish Parliament Boundaries.