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by nl 2996 days ago
There's manual curation of the schemes which map some human-eneterd data on web pages to facts, but the extraction is automatic.

See [1], noting that human annotation is responsible for 250K of the 100 million high confidence facts in the system.

I believe they have some manual overrides in a few cases, but the system itself is automatic.

[1] https://research.google.com/pubs/pub45634.html