Complex sentence: Gershom Mendes Seixas (1745-1816) the first native-born Jewish minister in the United States, was the minister of Congregation Shearith Israel, the Spanish and Portuguese Synagogue of New York from 1768 to 1776 and again from 1784 to 1816.
Split into simpler sentences: Gershom Mendes Seixas (1745-1816) was the first native-born Jewish minister in the United States. He was the minister of Congregation Shearith Israel, the Spanish and Portuguese Synagogue of New York from 1768 to 1776 and again from 1784 to 1816.