> db.metadata.findOne()

{

	"_id" : ObjectId("5526edec48c4fe6d30d93054"),

	"_typeHint" : "models.Metadata",

	"attachedTo" : {

		"dataset_id" : ObjectId("551ecc5d5b66807fd8ec56f7")

	},

	"contextId" : ObjectId("5526edec48c4fe6d30d93053"),

	"createdAt" : ISODate("2014-08-12T05:00:00Z"),

	"creator" : {

		"_typeHint" : "models.ExtractorAgent",

		"_id" : ObjectId("5526edec48c4fe6d30d93052"),

		"typeOfAgent" : "\"cat:extractor\"",

		"extractorId" : "http://dts.ncsa.illinois.edu/api/extractors/ncsa.cv.caltech101"

	},

	"content" : {

		"score" : [

			"-0.275160"

		],

		"category" : [

			"wrench"

		]

	}

}

"attached_to" : { "resource_type" : "dataset", "id" : ObjectId("551ecc5d5b66807fd8ec56f7") }