Complex sentence: Mount Airy had remained a Quaker enclave into the 1800s but evolved in the early 1900s into a summer colony that attracted many Greenwich Village artists and writers New Thought writer Ralph Waldo Trine built a cabin there.
Split into simpler sentences: Mount Airy had remained a Quaker enclave into the 1800s but evolved in the early 1900s into a summer colony that attracted many Greenwich Village artists and writers. Writers such as New Thought writer Ralph Waldo Trine, who built a cabin there.