Complex sentence: Although run independently like the majority of Chofetz Chaim affiliates, it continued to retain strong ties with its parent institution, until 1987 when Rabbi Davidowitz made the decision to unofficially break off from the Chofetz Chaim network.
Split into simpler sentences: Although run independently, like the majority of Chofetz Chaim affiliates, it continued to retain strong ties with its parent institution. This was until 1987 when Rabbi Davidowitz made the decision to unofficially break off from the Chofetz Chaim network.