Complex sentence: Perth and North Perthshire is a county constituency of the House of Commons of the Parliament of the United Kingdom, representing, at any one time, a seat for one Member of Parliament (MP), elected by the first past the post system of election.
Split into simpler sentences: Perth and North Perthshire is a county constituency of the House of Commons of the Parliament of the United Kingdom. It elects one Member of Parliament (MP) by the first past the post system of election.