Property:Date start

• Has type"Has type" is a predefined property that describes the <a href="/Special:Types" title="Special:Types">datatype</a> of a property and is provided by <a class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.: Date
• Has preferred property label"Preferred property label" is a declarative predefined property to specify a <a class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Preferred_property_label">preferred property label</a> and is provided by <a class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.: Date start (en)
• Has property description"Property description" is a predefined property that allows to describe a property in context of a language and is provided by <a class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.: Start date of the disease. (en)

The "Date start" type of this property is invalid