Ключевые слова: american, american football, arena, artificial, artificial turf, athletics, autumn, bleachers, center, competition, copy, day, dividing line, empty, fall, field, football, football field, forty, game, grass, green, horizontal, in a row, line, nobody, number, outdoors, play, playing field, recreation, season, sideline, space, sport, stadium, striped, sunlight, sunny, symmetry, team, turf, usa, yard, yard line, yardline,