def is_mpi(sheet_cell):
    """Is this variable produced by MPI?"""
    if not sheet_cell:
        return False

    status_ignored = sheet_cell.split(':')[-1].strip().upper()

    if status_ignored == 'X' or status_ignored == 'LIMITED':
        return True
    elif status_ignored == 'FALSE' or status_ignored == 'NO':
        return False
    else:
        print('Unknown MPI status: {}. Ignoring.'.format(sheet_cell))
        return False