Complex sentence: In the entire Reformed tradition, only Antoinette Brown, a Congregationalist, can claim an earlier ordination (1853) but it was never recognized by the Congregational denomination and Antoinette departed for the Unitarian Church.
Split into simpler sentences: In the entire Reformed tradition, only Antoinette Brown, a Congregationalist, can claim an earlier ordination (1853). Antoinette's ordination, however, was never recognized by the Congregational denomination and Antoinette departed for the Unitarian Church.