Assertion: agency's service | /r/CapableOf | mark its centenary
Facets:
value: in 2009
type: TEMPORAL
value: by publishing an official history
type: MANNER
Source sentences:
text: The service marked its centenary in 2009 by publishing an official history titled The Defence of the Realm: The Authorized History of MI5 and written by Christopher Andrew, Professor of Modern and Contemporary History at Cambridge University.