如何使用Json读取特定值？

                "Instances": [{
                    "nlu_classification": {
                        "Domain": "UDE",
                        "Intention": "Unspecified"
                    },
                    "nlu_interpretation_index": 1,
                    "nlu_slot_details": {
                        "Name": {
                            "literal": "ConnectedDrive"
                        },
                        "Search-phrase": {
                            "literal": "connecteddrive"
                        }
                    },
                    "interpretation_confidence": 5484
                }],
                "type": "nlu_results",
                "api_version": "1.0"
            }],
            "nlps_version": "nlps(z):6.1.100.12.2-B359;Version: nlps-base-Zeppelin-6.1.100-B124-GMT20151130193521;"
        }
    },
    "final_response": 1,
    "prompt": "",
    "result_format": "appserver_post_results"
}
                "Instances": [{