Complex sentence: In 1971, the foundation dissolved and Grace decided to give ownership to Hamilton College, which now the Root Glen is now maintained by the horticultural grounds staff of the college, and an advisory committee is responsible for the selection of new shrubs and flowers as needed.
Split into simpler sentences: In 1971, the foundation dissolved and Grace decided to give ownership to Hamilton College. The Root Glen is now maintained by the horticultural grounds staff of the college, and an advisory committee is responsible for the selection of new shrubs and flowers as needed.