Complex sentence: The constituency was created in 1983 from parts of the seats of Don Valley and Goole, and has been a Labour stronghold ever since, currently represented by Ed Miliband, the Leader of the Opposition.
Split into simpler sentences: The constituency was created in 1983 from parts of the seats of Don Valley and Goole, and has been a Labour stronghold ever since its creation. It is currently represented by Ed Miliband, the Leader of the Opposition.