Premise: Lucy Maud Montgomery {'1': ", '2': ", '3': ", '4': "} (November 30, 1874 – April 24, 1942) published as L.M. Montgomery, was a Canadian author best known for a series of novels beginning in 1908 with "Anne of Green Gables". The book was an immediate success. The central character, Anne Shirley, an orphaned girl, made Montgomery famous in her lifetime and gave her an international following.
Hypothesis: Shirley was Montgomery's sister.