Ключевые слова: 1 may, action, anniversary, balloons, banner, celebration, city, column, day, democracy, demonstration, demonstrator, europe, european, event, flag, folk, group, holiday, international, labor, labour, many, may, may day, meeting, member, national, opposition, parade, participation, people, placards, political, politics, procession, protection, public, red, russia, social, socialism, society, solidarity, spring, street, sunny, union, walking, worker,