ë (e-umlaut or diaeresis) not decoded in RDF output

{
"quads": [
[

{ "type": "uri", "value": "http:\/\/any23.org\/tmp\/" }

,
"http:\/\/purl.org\/dc\/terms\/title",

{ "type": "literal", "value": "Ti\u00c3\u00absto - Wikipedia, the free encyclopedia", "lang": null, "datatype": null }

,
null
],
[

{ "type": "bnode", "value": "node57ae60d4152c8125e46a2ce59389333b" }

,
"http:\/\/www.w3.org\/2006\/vcard\/ns#fn",

{ "type": "literal", "value": "Ti\u00c3\u00absto", "lang": null, "datatype": null }

,
null
],
...

The above is the output from extracting triples from the following page with the Service.
https://en.wikipedia.org/wiki/Tiesto
You can easily view that we are not decoding the e-umlaut.
We should fix this.