Ключевые слова: 50, 50 yard line, across, american football, angle, artificial, athletics, background, black, blue, closeup, college, color, competition, detail, down, field, fifty, foot, football, football field, game, grass, green, image, line, lines, marks, number, outdoor, outdoors, painted, photo, photograph, picture, playing field, professional, recreation, school, sport, sports, stadium, team, texture, turf, up, vertical, white, yard,