Complex sentence: Although not based on any of the origina Robins, elements of his character are lifted from both Dick Grayson and Tim Drake, with his background of deducing Batman's identity and having his father killed by criminals.
Split into simpler sentences: Although not based on any of the original Robins, elements of his character are lifted from both Dick Grayson and Tim Drake. John Blake shares Drake's background of deducing Batman's identity and having his father killed by criminals.