code: def read_from_file(cls, filename: str, question: List[Token]) -> 'TableQuestionKnowledgeGraph':
          
          return cls.read_from_lines(open(filename).readlines(), question)
docs: We read tables formatted as TSV files here. We assume the first line in the file is a tab
          separated list of column headers, and all subsequent lines are content rows. For example if
          the TSV file is:
  
          Nation      Olympics    Medals
          USA         1896        8
          China       1932        9
  
          we read "Nation", "Olympics" and "Medals" as column headers, "USA" and "China" as cells
          under the "Nation" column and so on.