SoccerNet-v2: A dataset and benchmarks for holistic understanding of broadcast soccer videos - Deliege, A.; Cioppa, A.; Giancola, S.; Seikavandi, M. J.; Dueholm, J. V.; Nasrollahi, K.; Ghanem, B. M.; Van Droogenbroeck, M. (IEEE/CVF Conference on Computer Vision and Pattern Recognition, 2021)