Complex sentence: The city of South Bend wanted to close the conservatory in late 2006 because it cost too much, but the conservatory and greenhouse remain open due to the hard work of the Botanical Society of South Bend and committed South Bend City Council members and community members.
Split into simpler sentences: The city of South Bend wanted to close the conservatory in late 2006 due to high operating cost. However, the conservatory and greenhouse remain open due to the hard work of the Botanical Society of South Bend, South Bend City Council members, and community members.