def get_desc():
    """
    Get description for help text

    Parameters
    ----------
    no inputs

    Returns
    -------
    a string with contains the description
    """
    return """Combine multiple VCFs into a distance matrix.
              Distance measures according to five different models are available:
              * Number of differences

              * Jukes-Cantor distance (jc69)
              * Tajima-Nei distance (k80)
              * Kimura 2-parameter distance (tn84)
              * Tamura 3-parameter distance (t93)
           """
