Complex sentence: Irene Adler is a fictional character featured in the Sherlock Holmes story "A Scandal in Bohemia" by Sir Arthur Conan Doyle, published in July 1891.
Split into simpler sentences: Irene Adler is a character in the stories written by Sir Arthur Conan Doyle. She was first featured in the short story "A Scandal in Bohemia", published in July 1891.