answer: #Person2# comes home late because #Person2# was captivated by the singer at the subway exit and forgot the time. #Person1# encourages #Person2# to do it next time and tells #Person2# the real art in the subway station in Russia.
documents: #Person1#: What's your little caper? Come home so late! We are all worried about you.
  #Person2#: Oh, I am terribly sorry. But I was so captivated with the singer at the subway exit. So I forgot the time.
  #Person1#: Singing? At the subway exit? Oh, it sounds like someone needs some money.
  #Person2#: Oh, no, the guy was a musician who just sang. He played the guitar and sang so many cool pop songs. Many people were drawn to his music and there was no hat on the floor. He sang for appreciation, but not for money.
  #Person1#: It is just pop song, you could have sung there too if you want it.
  #Person2#: Oh, no, it was a kind of pop art. I like it but I couldn't do it that well.
  #Person1#: Honey, just do it next time. Have you heard of the real art in the subway station in Russia?
  #Person2#: No, but tell me some. I am interested.
  #Person1#: Many oil painting exhibitions are there. That is a kind of Museum Exhibition.
  #Person2#: Are there many people there? Do you think people actually like them?
  #Person1#: I am sure you will. There are some works, and some students who major in painting interpret the meaning for visitors. And people can enjoy the paintings while waiting for the train.
  #Person2#: But I still prefer the pop music in the subway.
  #Person1#: Both the pop music and the oil painting are arts, but with different aesthetic values.
  #Person2#: Dad, you talk well, but can you appreciate that kind of art?
  #Person1#: Not well enough, but I'm learning.