public LinkNeighborhood getLN(URL url) throws MalformedURLException {
        LinkNeighborhood ln = null;
        String urlId = url2id.get(url.toString());
        if (urlId != null) {
            String strln = authID.get(urlId);
            ln = parseString(strln);
        }
        return ln;
    }
DEPRECATED: may cause OutOfMemoryError on large crawls.
ache/src/main/java/achecrawler/link/BipartiteGraphRepository.java