def _compose_sources(compose):
    """
    Get compose sources .

    :param compose dict: Compose info from ODCS.
    :return: a list of lists in format [[N1, S1, V1, C1], [N2, S2, V2, C2]...].
    :rtype: list
    """
    source_value = compose.get("source", "")
    sources = []
    for source in source_value.split():
        sources.append(source.strip().split(":"))
    return sources