Ключевые слова: 10 yard line, 50 yard line, american, artificial, big, blades, blue sky, boundaries, chalk, cloud, college, concept, cut, empty, end zone, endzone, even, expensive, fake, field, football, game, goal line, grass, green, in or out, lawn, level, lines, match, midfield, number, outdoor, perfect, pitch, play, professional, run, school, soccer, sport, spring, sprint, stadium, summer, sunshine, super bowl, symbol, team, touchdown, training, turf, yard line,