Ключевые слова: activity, american, background, ball, college, color, colorful, competition, contour, design, equipment, field, fill, filled, flat, football, fun, game, goal, graphic, icon, illustration, isolated, lace, league, leisure, line, linear, object, outline, oval, pigskin, play, power, professional, recreation, rugby, score, shadow, sign, single, skin, sport, symbol, team, touchdown,