Complex sentence: The Somain-Halluin railway was built in the 1870s and linked the town of Somain in the département du Nord with Halluin near the Belgian border, via Orchies and Tourcoing.
Split into simpler sentences: The Somain-Halluin railway was built in the 1870s. It linked the town of Somain in the département du Nord with Halluin near the Belgian border, via Orchies and Tourcoing.