trim freebase data dump to only English entities - go

Question

I have a compressed freebase data dump that has all the entities in it. How can I use grep or something else to trim the data dump to only contain english entities?
Here is what I am trying to get the rdf dump to look like: http://play.golang.org/p/-WwSysL3y3
<card>
<title></title>
<image></image>
<text></text>
<facts>
<fact></fact>
<fact></fact>
<fact></fact>
</fact>
</card>
Where card is each entity with content in all of the children elements. Title is the /type/object/name. Text is the image for mid of the topic done by "https://usercontent.googleapis.com/freebase/v1/image"%s"\n", id. Text is the /common/document/text for the entity. and facts and its fact children as the facts like age, birth-date, height, the facts that show up in the knowledge panels in search.
Here is my attempt to parse the rdf into xml like this in Go ( Golang ). I'd appreciate it if someone could help me get the rdf in this form.
Here is the algorithm or logic of what I am trying to do:
For every entity written in english:
parse the `type/object/name`property's and write that to the xml file in the `<title></title>` element.
parse the mid and add that to `https://usercontent.googleapis.com/freebase/v1/image`and then write the result to the xml file in the <image></image> element.
parse the common/document/text property and writes its value to the <text></text> element.
And lastly, for each fact about the entity, write them to the <fact></fact> elements in the XML file, which are all children of the <facts></facts> element.

Answer 1

I agree with Joshua Taylor that the question is difficult to decipher, because entity is usually a synonym for Freebase object, which may have labels in multiple languages (or no labels/text at all).
If we recast the question as something along the lines of "How do I filter all non-English text from the compressed Freebase dump?," it becomes something that we can actually answer.
In RDF, all strings are labeled with their language, so if we see something like
ns:award.award_winner rdfs:label "Lauréat"#fr.
We can tell that Lauréat is the French name for the Freebase type called Award Winner in English.
To filter out non-English labels, use zgrep to filter those lines which match "#... but not "#en.
This will give you all the types, properties, numbers, and English labels/descriptions, but won't exclude those objects which don't have at least one English label (another possible interpretation of your question). To do that level of filtering, you'll probably need something more powerful than grep.