The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
Happened as dated, per the source: the 17km "stretch from Duhai Depot (in Ghaziabad) to Sahibabad near the Delhi border" opened to the public the day after its Friday inauguration.
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