Complex sentence: A. Langley Searles (?-May 9,2009) was an American science fiction enthusiast and scholar of the history of science fiction from Bronxville, New York, best known for his fanzine "Fantasy Commentator", which he published and edited.
Split into simpler sentences: A. Langley Searles (?-May 9,2009) was an American science fiction science fiction enthusiast and scholar of the history of the field, from Bronxville, New York. Searles is best known for the scholarly fanzine "Fantasy Commentator", which he published and edited.