def simplify_to_conllu(conllulexF):
    """
    Given a .conllulex file (or iterable over lines), clear the 9 columns
    containing MWE and supersense information, and the lextag column at the end.
    """
    result = ''
    for ln in conllulexF:
        row = ln.strip()
        if row and not row.startswith('#'):
            row = row.split('\t')
            row[10:] = ['']*8
            row = '\t'.join(row)
        result += row + '\n'
    return result