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Students learn the information on different heritage sites at Heritage Park in Agartala, capital of the northeastern state of Tripura, India, on April 18, 2019, on the occasion of the World Heritage Day. (Xinhua/Stringer)
Students learn the information on different heritage sites at Heritage Park in Agartala, capital of the northeastern state of Tripura, India, on April 18, 2019, on the occasion of the World Heritage Day. (Xinhua/Stringer)