National Association of Professional Base Ball Players
type: Thing
description: first professional baseball league
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citations:
  source: Freebase Data Dumps
  stated in qid: Q15241312
  pub year: 2013
meta:
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  domain: baseball_league
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  data source: Wikidata (CC0 / public domain)
  license: https://creativecommons.org/publicdomain/zero/1.0/
  api version: v1
  served at: 2026-08-06T15:00:52.496154Z
  entity updated at: 2026-04-10T23:56:59.786680+00:00Z
  entity created at: 2026-04-10T23:56:59.786680+00:00Z