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Challenge Entry: PoliMedia

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Title: PoliMedia
Team: PoliMedia

Short Description

The PoliMedia project linked the minutes of the debates in the Dutch Parliament (Dutch Hansard) to the databases of historical newspapers and ANP radio bulletins to allow cross-media analysis of coverage in a uniform search interface that can be visited via www.polimedia.nl.

Long Description

“How do media cover political debates? Answering this question requires a cross-media analysis of the minutes of the political debates, newspaper articles & photos and radio bulletins. However, this type of research is currently laborious. You will need to go to a physical archive, or you can work with a multitude of online archives with different interfaces and limitations.

The PoliMedia project linked the minutes of the debates in the Dutch Parliament (Dutch Hansard) to the databases of historical newspapers and ANP radio bulletins to allow cross-media analysis of coverage in a uniform search interface that can be visited via www.polimedia.nl.

For each fragment from a single speaker in a debate, we extracted relevant information: the speaker, the date, important terms from its content and important terms from the description of the complete debate. This information was then combined to create a query with which we searched the archives of newspapers, radio bulletins and television programmes. Media items that corresponded to this query were retrieved and a link was created between the speech and the media item, creating a Semantic Web of Dutch Hansard and media coverage. This Semantic Web contains links from the Dutch Hansard to newspaper articles and radio bulettins. From evaluations it was found that there was a 62% recall and 75% precision.

To navigate this Semantic Web, a search user interface was developed based on a requirements study with five scholars in history and political communication. We created a faceted search interface in which the Dutch parliamentary minutes can be searched in full-text and in which refinements can be performed based on the speaker, the role of the speaker (parliament of government), political party and year. These debates are presented with links to the original locations of the media items.

On top of that we also published our data as linked open dataset via a Sparql Endpoint (http://data.polimedia.nl/)

PoliMedia is a project by the Erasmus University Rotterdam (Henri Beunders, Max Kemman & Martijn Kleppe), TU Delft (Damir Juric & Geert-Jan Houben), VU (Laura Hollink), Netherlands Institute for Sound and Vision (Jaap Blom & Johan Oomen) and all data was provided by the National Library.”

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