“…Within the past two decades, we have seen the emergence of various workshops and conferences that support community driven benchmarking activities. TREC [38], TRECVid [3], ImageCLEF [23], MediaEval [26], etc., all have played a part in supporting the community to generate test collections and coordinate such international comparative benchmarking efforts. In most cases, these activities have focused on the release of test collections that support the retrieval of online content, such as web pages, online or professional videos, blogs, and other crawlable content.…”