In this task, you're given passages that contain mentions of names of people, places, or things. Some of these mentions refer to the same person, place, or thing. Your job is to write questions that evaluate one's understanding of such references. Good questions are expected to link pronouns (she, her, him, his, their, etc.) or other mentions to people, places, or things to which they may refer. Do not ask questions that can be answered correctly without understanding the paragraph or having multiple answers. Avoid questions that do not link phrases referring to the same entity. For each of your questions, the answer should be one or more phrases in the paragraph, and it should be unambiguous.
One example is below.
Q: 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.
A: Who believes Fagin's gang make wallets and handkerchiefs?.
Rationale: This question is based on the following sentence in the passage "He believes they make wallets and handkerchiefs". It evaluates the understanding that the pronoun "he" refers to name "Oliver". You can ask questions like this one about most pronouns in a paragraph.
Q: Passage: Every year, 12-year old Samuel, 10-year old Jeffrey and 8-year old Michael Douglas visit their grandfather, Mori Tanaka at his cabin. Mori trains his grandchildren in the art of Ninjutsu. As the summer comes to an end, Mori gives each of them a new "ninja" name based on their personalities: 'Rocky', 'Colt', and 'Tum-Tum'. 
Meanwhile, the boys' father, Sam Douglas, is an FBI agent who stages a sting operation to entrap Hugo Snyder in the sale of warheads. Snyder escapes the trap with the use of his own ninja henchmen. Snyder decides to test Mori's fighting skill. The boys ignore Mori's orders to stay in the house and aid by defeating two ninjas on their own. Snyder threatens Mori's family if he doesn't get Douglas off his back, and Mori chides the boys briefly for interfering in his personal affairs. When they return home, they find their father unenthusiastic to see what they had learned during their visit and more annoyed at their new names. Emily, a friend of Rocky's, compliments his new name and agrees to ride with them to school the next day. Snyder develops a plan to kidnap the boys to use them as leverage to get Douglas to back off. Since the FBI watches them, his assistant Brown contacts his nephew Fester and his buddies Hammer and Marcus to kidnap the boys. Due to Douglas and his FBI crew's presence, they are unable to capture the boys.
A:
What is the ninja name of the youngest brother?