Your task is to decide which of the entities listed below are referents (examples or instances) of the concept "{concept}". Reply by listing from the original list only such entities that are referents of {concept}. Output the list as a valid JSON list of strings. Do not include any comments or explanations besides the correctly formatted JSON output.

<example>
Entities: ["Poland", "Mongolia", "Spain", "Finland", "Uruguay", "Norway"]
Concept: "nordic country"
Referents (JSON): ["Finland", "Norway"]
</example>

Entities: {entities}
Concept: "{concept}"
Referents (JSON): ...