curl -XPUT 'http://localhost:9200/park_maintenance' -d '{
    "settings": {
        "number_of_shards": 5       
    },
    "mappings": {
        "park": {
            "properties": {
                "park": {
                    "properties": {
                        "name": {
                            "type": "string"
                        },
                        "cost": {
                            "type": "long"
                        },
                        "tree": {
                            "type": "nested",
                            "properties": {
                                "height": {
                                    "type": "long"
                                },
                                "species": {
                                    "type": "string"
                                }
                            }
                        }
                    }
                }
            }
        }
    }
}'
curl -X PUT 'http://localhost:9200/park_maintenance/_alias/pm'