With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: Various procedures are used if a tie occurs. In tournament play, as well as in the NHL playoffs, North Americans favour "sudden death overtime", in which the teams continue to play twenty-minute periods until a goal is scored. Up until the 1999–2000 season, regular-season NHL games were settled with a single five-minute sudden death period with five players (plus a goalie) per side, with both teams awarded one point in the standings in the event of a tie. With a goal, the losing team would be awarded two points and the winning team none (just as if they had won in regulation). Counting all time from when the puck first drops, a typical 60-minute game takes around 2 hours and 20 minutes to complete.
text_B: If a team in the NHL has zero points in the standings at the end of a season, did they have a perfect season?
YES.