Assertion: database's data | /r/HasProperty | harmonized with the pinkerton data
Facets:
value: from 1970
type: TEMPORAL
Source sentences:
text: The data generated for 1997 to 2007 was then harmonized with the Pinkerton data from 1970 to 1997 to create a unified database of terrorist events from 1970 to 2007 (excluding 1993).