Complex sentence: Dubbed by the locals as "Ford's Folly" the structure failed at its task because the feeding brook provided insufficient volume and the ground was too porous to allow for a pond to grow behind the stone structure.
Split into simpler sentences: Dubbed by the locals as "Ford's Folly" the structure failed at its task. The feeding brook provided insufficient volume and the ground was too porous to allow for a pond to grow behind the stone structure.