def METHOD_NAME(cls, filename: Path, data: str) -> dict:
    """Source heuristic for Scopus"""
    result = {"confidence": 0.0}
    if "source={Scopus}," in data:
        result["confidence"] = 1.0
        return result
    if "www.scopus.com" in data:
        if data.count("www.scopus.com") >= data.count("\n@"):
            result["confidence"] = 1.0
    return result