instruction:
In this task, you are given a question. You have to answer the question based on your information.
question:
Whom was an immigrant Samuel Der-Yeghiayan or Charles Amirkhanian?
answer:
Samuel Der-Yeghiayan


question:
Nautilus Pompilius was an influential Soviet, and later Russian, rock band founded in 1983 by Dmitry Umetsky, and which person, that was born on October 15, 1961 ?
answer:
Vyacheslav Butusov


question:
Which city, Yixing or Shangqiu, has a larger population?
answer:

Yixing