Ключевые слова: american, american football, artificial, athletics, background, backgrounds, competition, competitive, design, detail, empty, event, field, football, football field, game, goal, grass, green, ground, horizontal, land, leisure, line, lines, match, natural, nfl, nobody, old, outdoor, outdoors, pattern, plaster, play, playground, recreation, sport, stadium, structure, summer, surface, team, team sport, texture, turf, white, yard, yard line,