Where does the data for Lower Bracket Quarterfinal 1: TBD vs TBD come from?

From PandaScore Dota 2 match records, refreshed about every five minutes. The page shows when it was last updated.

What format is Lower Bracket Quarterfinal 1: TBD vs TBD?

Lower Bracket Quarterfinal 1: TBD vs TBD is listed as BO3 at 1win Essence.

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Source: PandaScore · Updated: Nov 5, 09:00 AM UTC

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