Question: When was nanda devi national park added to the unesco list of world heritage?
Answer: 1988
Disambiguated annotations:
qaPairs: question: When was the Nanda Devi National Park added to the UNESCO World Heritage Site list?
answer: 1988
question: When was the Nanda Devi National Park expanded to encompass the Valley of Flowers National Park as a UNESCO World Heritage site?
answer: 2005