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Detecting and Tracking Multiple Targets Simultaneously with Clou

I search in posts and find this answer :

           Cloud Recognition can only maintain one target at a time,  but you can mix Cloud and Device targets to achieve what you're describing.

          see: https://developer.vuforia.com/resources/dev-guide/simultaneous-use-cloud-reco-udt-and-device-databases

but the link failure.

how can I do this?   please hlep me, thank!!