Transfer Xcode project to playground app project

Dear Teams,

I try to transfer this Xcode sample project to the Playground app project.

However, when I move all swift files and the CoreML file called 'ExerciseClassifier.mlmodel' on the folder to the Playground app project, it shows the error, "Cannot find type 'ExerciseClassifier' in scope".

What could I do to remove the error and make a proper working project on Playground?

Thanks.

Transfer Xcode project to playground app project
 
 
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