Ключевые слова: accident, city, cold, covered, danger, dangerous, day, falling, fell, footpath, footprints, freeze, frost, frozen, heavy, ice, icy sidewalk, injury, melting, nature, outdoors, park, pedestrian, road, season, sidewalk, sleet, slide, sliding, slip, slippery road, slush, snow, snowfall, snowing, street, sunlight, uncleaned, urban, visible, walk, walkway, weather, wet, white, winter,