Template:Infobox Period

There is a problem with parsing the infobox

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• 1

  <title source="name">

• Opening and ending tag mismatch

  Incorrect XML markup. Please validate your XML

• Opening and ending tag mismatch

• Extra content at the end of the document

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  <header>Information</header>
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  <data source="Start"><label>Start date</label></data>
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  <data source="End"><label>End date</label></data>
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  <data source="Preceded by"><label>Preceded by</label><format>[[{{{Preceded by}}}]]</format></data>
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  <data source="Proceeded by"><label>Proceeded by</label><format>[[{{{Proceeded by}}}]]</format></data>
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  </group>
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