Ключевые слова: alarm, alertness, arena, bench, big, camera, cameras, cctv, control, court, electronic, equipment, field, football, football pitch, grass, green, guard, hooligans, industry, modern, monitor, monitoring, observe, pitch, playing, playing field, pole, privacy, private, property, protect, protection, record, safe, safety, seats, security, spy, stadium, surveillance, sward, symbol, system, technology, urban, video, view, watching,