Property talk:P1840

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investigated by
person or organization involved in investigation of the item

Description	The person or organisation that investigated/is investigating the event
Data type	Item
Domain	According to this template: events that are investigated, e.g. transportation accidents, crimes, etc According to statements in the property: occurrence (Q1190554), human (Q5) or group of humans (Q16334295) When possible, data should only be stored as statements
Allowed values	organisations, people (note: this should be moved to the property statements)
Example	Grayrigg derailment (Q1028014) → Rail Accident Investigation Branch (Q7283877) His Majesty's Railway Inspectorate (Q3133363) murder of Victoria Climbié (Q6587566) → Herbert Laming, Baron Laming (Q1608707) Plebgate (Q7204344) → Metropolitan Police (Q1139213) 2013 Vauxhall helicopter crash (Q3182149) → Air Accidents Investigation Branch (Q406725)
Source	Wikipedia articles, news reports, websites of investigating authorities (note: this information should be moved to a property statement; use property source website for the property (P1896))
Tracking: usage	Category:Pages using Wikidata property P1840 (Q26250088)
See also	studied in (P2579), principal investigator (P8329)
Lists	Items with the most statements of this property Count of items by number of statements (chart) Items with the most statements Items with the fewest statements Count of items by number of sitelinks (chart) Items with the most sitelinks Items with the most sitelinks, but no link to one Wikipedia (sample: Welsh Wikipedia, cywiki) Items with the fewest sitelinks Most linked wikis Items with the most identifier properties By value of property Most statements Fewest statements Most sitelinks Most linked wikis Total of sitelinks on items Most identifiers Fewest identifiers Items with no other statements Most recently created items Items with novalue claims Items with unknown value claims Usage history (total) Usage history (main statement) Chart by item creation date Map of people by place values: place of birth educated at work location residence place of death place of burial January 1st dates People with date of birth on January 1 People with date of death on January 1 People with both dates on January 1 Database reports/Constraint violations/P1840 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 889 Main statement 840 94.5% of uses Qualifier 43 4.8% of uses Reference 6 0.7% of uses
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Type “occurrence (Q1190554), human (Q5), group of humans (Q16334295)”: item must contain property “instance of (P31)” with classes “occurrence (Q1190554), human (Q5), group of humans (Q16334295)” or their subclasses (defined using subclass of (P279)). (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P1840#Type Q1190554, Q5, Q16334295, SPARQL

Value type “human (Q5), organization (Q43229), law enforcement agency (Q732717), legal proceeding (Q6087062)”: This property should use items as value that contain property “instance of (P31)”. On these, the value for instance of (P31) should be an item that uses subclass of (P279) with value human (Q5), organization (Q43229), law enforcement agency (Q732717), legal proceeding (Q6087062) (or a subclass thereof). (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P1840#Value type Q5, Q43229, Q732717, Q6087062, SPARQL

This property is being used by: ca:Plantilla:Infotaula esdeveniment uk:Шаблон:Катастрофа Please notify projects that use this property before big changes (renaming, deletion, merge with another property, etc.)