Complex sentence: St. Patrick's C.Y.F.C. were founded in 1936 by members of the Ringsend--based St. Patrick's branch of the Catholic Young Men's Society and as a result they were originally known as St. Patrick's C.Y.M.S. They adopted their current abbreviation in 1984.
Split into simpler sentences: St. Patrick's C.Y.F.C. were founded in 1936 by members of the Ringsend Branch of the St. Patrick's Catholic Young Men's Society. They were originally known as St. Patrick's C.Y.M.S. before adopting their current abbreviation in 1984.