Complex sentence: In game 6, opponent opened the scoring at 05:31 of the 1st period and never relinquished the lead, game-winning goal scored at 08:35 of the 1st period.
Split into simpler sentences: In game 6, opponent opened the scoring at 05:31 of the 1st period and never relinquished the lead. The game-winning goal scored at 08:35 of the 1st period.