Complex sentence: Trinity Church, the Anglican Church in Newport, Rhode Island, offered him an opportunity to become its minister, but he turned the offer down to become pastor of the Second Congregational Church in Newport, Rhode Island from 1755 until 1777.
Split into simpler sentences: Trinity Church, the Anglican Church in Newport, Rhode Island, asked him to become its minister, but he turned the offer down. Instead, he became pastor of the Second Congregational Church in Newport, Rhode Island, from 1755 until 1777.