Ключевые слова: action, angry, arrest, atmosphere, atmospheric, audience, clashes, competition, crowd, cup, dangerous, europe, european, fanatics, fans, field, fire, flares, football, game, gas, greece, greek, hooliganism, hooligans, match, national, olympiacos, olympiakos, paok, police, protest, pyrotechnics, riot, riots, semifinal, smoke, soccer, spectators, sports, stadium, stands, supporters, team, tear, thessaloniki, toumba, violence, violent,