Backbone Js - parse data issue

Backbone Js - parse data issue

I'm trying to parse data to a collection view from a json file that has
number key for each group of data within it. The JSON looks like this:
{
"0": {
"artifact_id": "36",
"timestamp": "2013-08-20 11:59:00",
"modified": "2013-08-20 11:59:00",
"text": "Why did the last one duplicate? I don't think I clicked
it twice...",
"author_desc": "",
"object_type": "artifact",
"comments": []
},
"1": {
"artifact_id": "35",
"timestamp": "2013-08-20 11:57:51",
"modified": "2013-08-20 11:57:51",
"text": "This is a new artifact for a new day.",
"author_desc": "",
"object_type": "artifact",
"comments": []
},
"2": {
"artifact_id": "34",
"timestamp": "2013-08-20 11:57:50",
"modified": "2013-08-20 11:57:50",
"text": "This is a new artifact for a new day.",
"author_desc": "",
"object_type": "artifact",
"comments": []
}
}
How do I write a model parse to take each one of the entries (0, 1, 2...
etc) as each model from within the data?