answer: #Person2# tells #Person1# #Person2# can speak Mandarin fluently and can understand Cantonese.
documents: #Person1#: How good is your Mandarin?
  #Person2#: Mandarin is the language I spoke since I was a child. So I can speak it very fluently.
  #Person1#: What dialect do you understand?
  #Person2#: I can speak and read Cantonese because I worked in Guangdong for many years.