In this task, you're expected to write answers to questions involving multiple references to the same entity. The answer to the question should be unambiguous and a phrase in the paragraph. Most questions can have only one correct answer.

Let me give you an example: Passage: Nearing London, Oliver encounters Jack Dawkins, a pickpocket more commonly known by the nickname the "Artful Dodger", and his sidekick, a boy of a humorous nature named Charley Bates, but Oliver's innocent and trusting nature fails to see any dishonesty in their actions. The Dodger provides Oliver with a free meal and tells him of a gentleman in London who will "give him lodgings for nothing, and never ask for change". Grateful for the unexpected assistance, Oliver follows the Dodger to the "old gentleman's" residence. In this way Oliver unwittingly falls in with an infamous Jewish criminal known as Fagin, the gentleman of whom the Artful Dodger spoke. Ensnared, Oliver lives with Fagin and his gang of juvenile pickpockets in their lair at Saffron Hill for some time, unaware of their criminal occupations. He believes they make wallets and handkerchiefs.
Question: Who believes Fagin's gang make wallets and handkerchiefs?
The answer to this example can be: Oliver.
Here is why: In the sentence "He believes they make wallets and handkerchiefs", the pronoun "he" refers to name "Oliver".

OK. solve this:
Passage: Billy leads a traveling troupe that jousts on motorcycles. "King William", as he styles himself, tries to lead the troupe according to his Arthurian ideals. However, the constant pressure of balancing those ideals against the modern day realities and financial pressures of running the organization are beginning to strain the group. Billy is also plagued by a recurring dream of a black bird. Tensions are exacerbated by Billy's constantly pushing himself despite being injured and the arrival of a promoter named Bontempi, who wants to represent the troupe.
After Billy spends a night in jail watching a member of his troupe beaten because Billy has refused a payoff to a corrupt local cop, Billy returns to the fairground where the troupe is next to perform and is shocked that some members want to join with the promoter. His sense of betrayal is heightened when his queen, Linet, admits that her feelings for him may not be the reason she remains with the troupe.
Things come to a head after Morgan, leader of the dissident faction who believes he should be king, wins the day's tournament and a fight breaks out between the troupe and rowdy members of the crowd. Billy faces an Indian rider with a black eagle crest on his breast plate, the black bird of his dreams. Billy defeats the Indian but aggravates his injury; later commissioning the Indian as a knight in his troupe. Morgan and several other riders leave the troupe to follow Bontempi. Billy's loyal supporter Alan also departs with his new girlfriend Julie and friend Bors to try to sort out his emotions. Billy and the remainder of the troupe settle at the fairground to await the dissidents' return.
Question: What color is the creature of King William's dreams?
Answer:
black.