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#subobject triplets are correctly displayed and reused in formats such as broadtable or category but fails on other export formats.

{{#ask:[[Reference::fluit2003ontology]]|?Author|?Title|?Year|format=json|headers=show|link=all}}

JSON export fails with -> 

{
	"properties": {
		"author" : { "valueType": "text" },
		"title" : { "valueType": "text" },
		"year" : { "valueType": "text" }
	},
	"items": [
	
	]
}

RDF export fails with ->

<rdf:RDF
	xmlns:rdf="&rdf;"
	xmlns:rdfs="&rdfs;"
	xmlns:owl ="&owl;"
	xmlns:swivt="&swivt;"
	xmlns:wiki="&wiki;"
	xmlns:property="&property;">

	<owl:Ontology>
		<swivt:creationDate rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2012-02-29T00:34:24+01:00</swivt:creationDate>
		<owl:imports rdf:resource="http://semantic-mediawiki.org/swivt/1.0"/>
	</owl:Ontology>
	<owl:DatatypeProperty rdf:about="http://semantic-mediawiki.org/swivt/1.0#creationDate" />
	<!-- Created by Semantic MediaWiki, http://semantic-mediawiki.org/ -->
</rdf:RDF>

RSS export fails -> empty content 

CSV export fails -> only contains of headers

Bibtex export fails -> export file completely empty

Tested on MediaWiki	1.18.0, PHP	5.3.8 (apache2handler), MySQL	5.5.16 Semantic MediaWiki (Version 1.7.0.2) (r109011), Semantic Result Formats (Version 1.7)	(r107772)