Complex sentence: Dalton was the site of the first commercial pottery in Ohio, the Houghton Pottery, established in 1841, and was operated by the Houghton family until it was sold in 1946.
Split into simpler sentences: Dalton was the site of Ohio's first commercial pottery, the Houghton Pottery, which was established in 1841. The facility was operated by the Houghton family until it was sold in 1946.