Complex sentence: The Central Conference of American Rabbis (CCAR), founded in 1889 by Rabbi Isaac Mayer Wise, is the principal organization of Reform rabbis in the United States and Canada, the CCAR is the largest and oldest rabbinical organization in the world.
Split into simpler sentences: The Central Conference of American Rabbis (CCAR), founded in 1889 by Rabbi Isaac Mayer Wise, is the principal organization of Reform rabbis in the United States and Canada. The CCAR is the largest and oldest rabbinical organization in the world.