Complex sentence: In 1842 Fairbanks founded St. Johnsbury Academy with brother Erastus as well as founded St. Johnsbury Athenaeum, St. Johnsbury Rotary Planetarium, and the Fairbanks Museum.
Split into simpler sentences: In 1842 Fairbanks founded St. Johnsbury Academy with his brother Erastus. He also as founded the St. Johnsbury Athenaeum, St. Johnsbury Rotary Planetarium, and the Fairbanks Museum.