Complex sentence: Seeland (Drei-Seen-Land) is a region in Switzerland, at the foot of the first mountain range of the Jura Mountains containing the 3 lakes of Morat (Murten), Neuchâtel and Bienne (Biel).
Split into simpler sentences: Seeland (Drei-Seen-Land) is a region in Switzerland containing Lake Biel, Lake Neuchâtel, and Lake Murten. The Seeland is the area located at the foot of the Jura Mountains contained by the 3 lakes of Morat (Murten), Neuchâtel and Bienne (Biel).