Complex sentence: Approximately 300 delegates from the member denominations meet together each fall in a joint General Assembly with the Council's humanitarian partner organization, Church World Service, which is governed by its own board made up of representatives from the NCC member communions.
Split into simpler sentences: Approximately 300 delegates from the member denominations meet together each fall in a joint General Assembly with the Council's humanitarian partner organization, Church World Service. CWS is governed by its own board made up of representatives from the NCC member communions.