Complex sentence: The buildings of the colliery were built by architect Paul Knobbe, and were completed in 1904 with its engine house, or machine house, in which the most up-to-date generators and machinery used in the colliery are housed.
Split into simpler sentences: The buildings of the colliery were built by architect Paul Knobbe. The site was completed in 1904 with its engine house, or machine house, in which the most up-to-date generators and machinery used in the colliery are housed.