docs: def readSIFGraph(filename):
    p = sif_parser.Parser(filename)
    """
    input: string, name of a file containing a Bioquali-like graph description
    output: asp.TermSet, with atoms matching the contents of the input file
    
    Parses a Bioquali-like graph description, and returns
    a TermSet object.
    Written using original Bioquali
    """
  
    accu = TermSet()
    file = open(filename,'r')
    s = file.readline()
    while s!="":
      try: accu = p.parse(s)
      except EOFError: break
      s = file.readline()
    return accu