Based on the given question and tppic, give an answer. The answer is available on on the internet. The questions are mostly centered around a single named entity.

Input: Consider Input: concept: Virgin America  question:  what type of aircraft does virgin america use?

Output: ['Airbus A319', 'Airbus A320']


Input: Consider Input: concept: Medicare  question:  what is medicare a?

Output: ['Centers for Medicare and Medicaid Services']


Input: Consider Input: concept: Sparta  question:  what form of government was practiced in sparta?


Output: ['Monarchy', 'Diarchy']