{
  "format_version": "1.13.0",
  "minecraft:structure_template_feature": {
    "description": {
      "identifier": "guardian:nautilus_block_feature_mcstructure"
    },
    "structure_name": "mystructure:nautilus_block",
    "adjustment_radius": 8,
    "facing_direction": "random",
        "constraints": {
	"grounded": {},
	"block_intersection": {
		"block_whitelist": [
		          {
		                "name": "minecraft:sand"
	               }
                ]
            }
        }
    }
}
