Complex sentence: Thomas John Dibdin (March 21,1771-September 16,1841), English dramatist and song-writer, son of Charles Dibdin, the song-writer, and of Mrs Davenet, an actress whose real name was Harriet Pitt.
Split into simpler sentences: Thomas John Dibdin (March 21,1771-September 16,1841) was an English dramatist and song-writer. He was the son of Charles Dibdin, a song-writer, and of Mrs Davenet, an actress whose real name was Harriet Pitt.