def _get_column_lables(line):
    """
    Extract the following column lables from 
    pilercr "SUMMARY BY POSITION" table: 
    "Position", "Length", "Copies", "Repeat", "Spacer", "Strand",
    "Consensus".
    """
    lables = line.split()
    lables_to_remove = ["Array", "Sequence", "#", "+"]
    lables = [lable for lable in lables if lable not in lables_to_remove]
    lables.insert(5, "Strand")
    
    return lables