Complex sentence: For much of its history Aberdour was two villages, Wester Aberdour and Easter Aberdour, on either side of the Dour Burn; however this distinction was blurred by the 19th century arrival of the railway.
Split into simpler sentences: For much of its history Aberdour was two villages, Wester Aberdour and Easter Aberdour, on either side of the Dour Burn. Although this distinction was blurred by the 19th century arrival of the railway.