def write_key(key, value):
    """Return a string with the key, value in the WOK RIS format
    """
    if isinstance(value, list):
        lines = [key + ' ' + value[0].strip()]
        for val in value[1:]:
            lines.append('   ' + val.strip())
        return lines
    else:
        return [key + ' ' + value.strip()]
