This task is about writing a correct answer for the reading comprehension task. Based on the information provided in a given passage, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.
Q: Passage: Most historians today, including John's recent biographers Ralph Turner and Lewis Warren, argue that John was an unsuccessful monarch, but note that his failings were exaggerated by 12th- and 13th-century chroniclers. Jim Bradbury notes the current consensus that John was a "hard-working administrator, an able man, an able general", albeit, as Turner suggests, with "distasteful, even dangerous personality traits", including pettiness, spitefulness and cruelty. John Gillingham, author of a major biography of Richard I, follows this line too, although he considers John a less effective general than do Turner or Warren, and describes him "one of the worst kings ever to rule England". Bradbury takes a moderate line, but suggests that in recent years modern historians have been overly lenient towards John's numerous faults. Popular historian Frank McLynn maintains a counter-revisionist perspective on John, arguing that the king's modern reputation amongst historians is "bizarre", and that as a monarch John "fails almost all those [tests] that can be legitimately set". Question: What biographers argue that John was an unsuccessful monarch?
A:
Ralph Turner and Lewis Warren