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+# Replaced by the Topics API
+Note that this proposal has been replaced by the [Topics API](https://github.com/jkarlin/topics/).
+
 # Federated Learning of Cohorts (FLoC)
 This is an explainer for a new way that browsers could enable interest-based advertising on the web, in which the companies who today observe the browsing behavior of individuals instead observe the behavior of a cohort of similar people.