Assertion: national park's area | /r/HasProperty | designated as a bird sanctuary
Facets:
value: on 13 march
type: TEMPORAL
Source sentences:
text: Previously the private duck shooting preserve of the Maharaja of Bharatpur since the 1850s, the area was designated as a bird sanctuary on 13 March 1976 and a Ramsar site under the Wetland Convention in October 1981.