Question: Is Lord Voldemort associated with a staff member of Durmstrang?
Answer: Igor Karkaroff is the headmaster of Durmstrang school. Karkaroff is a former Death Eater. The Death Eaters were Voldemort's minions.. The answer is: yes.

Question: Do all cancer patients get disability?
Answer: All forms of cancer qualify as diagnoses that can result in disability. Disability is not determined by diagnosis, but by degree of impairment. Some cancer patients do not experience major impairment.. The answer is: no.

Question: Can Amtrak's Acela Express break the sound barrier?
Answer:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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Amtrak's Acela Express is the fastest train in the Western Hemisphere and can reach 150 mph. A US Navy plane would need to travel 770 mph to break the sound barrier.. The answer is: no.