Complex sentence: Between 1838-1842, Ham Common was the site of a utopian spiritual community and free school called Alcott House (or the Ham Common Concordium), founded by educational reformer and "sacred socialist" James Pierrepont Greaves and his followers.
Split into simpler sentences: Between 1838-1842, Ham Common was the site of a utopian spiritual community and free school called Alcott House (or the Ham Common Concordium). It was founded by educational reformer and "sacred socialist" James Pierrepont Greaves and his followers.