Complex sentence: The clothing and fashion aspect of the casual subculture began in the late 70s after fans from Liverpool Football Club introduced the rest of England to European fashions that they somehow acquired while following their teams at European games.
Split into simpler sentences: The clothing and fashion aspect of the casual subculture began in the late 70s. The Liverpool Football Club introduced the rest of England to European fashions that they somehow acquired while following their teams at European games.