Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Phong Nha-Ke Bang National Park' has mentioned 'Grotto' in the following places:
Occurrence Sentence Text Source
Phong Nha-Kxe1xbaxbb Bxc3xa0ng is noted for its cave and grotto systems as it is composed of 300 caves and grottos.
Besides the grotto and cave systems, Phong Nha has the longest underground river.
Dark Grotto (Hang Txe1xbbx91i): located upstream of Son River running to the branch of Chay River on the left.
This cave is 5,258 m long and with a height of 83 m. The entry is high and wide with heavy forest around the cave mouth E Grotto (Hang E): a 736 m-long grotto accessible by the Hxe1xbbx93 Chxc3xad Minh trail Cha An Grotto (Hang Chxc3xa0 An): a 667 m-long grotto, with the width of 15 meters Thung Grotto (Hang Thung): This grotto has an underground river of 3351 m, with the height in some part exceed 133 .
This river receives water resources from Rao Thuong En Grotto (Hang xc3x89n): a 1645 m long, 78.6 m high grotto Khe Tien Grotto (Hang Khe Tixc3xaan): located south of Phong Nha, this grotto is 520 m long.
Khe Ry Grotto (Hang Khe Ry): located south of Phong Nha.
The grotto is where the long Khe Ry stream (13.817xc2xa0km or 8.585 miles) runs out Khe Thi Grotto (Hang Khe Thi): a stream originating from the mountain, running underground the grotto
Vom Grotto (Hang Vxc3xb2m): a 15.05xc2xa0km long, 145 m high grotto with several underground rivers, pools.
This grotto features several spectacular stalagmite and stalactites.
In the recent exploring of British Cave Research Association, the scientists have found an abyss in Vom Grotto named Tang hole with the deep of over 255m.
Dai Cao Grotto (Hang xc4x90ai Cao): this grotto is a connection of Vom Grotto.
This grotto is 1645xc2xa0m long, 28xc2xa0m high.. Duot Grotto (Hang Duxe1xbbx99t): This is a connection of Dai Cao Grotto with the length of 3.927xc2xa0km and height of 45xc2xa0m. There are some fine sand fields inside.
Ca Grotto (Hang Cxc3xa1): a 1,500xc2xa0m long, 62xc2xa0m high grotto.
Ho Grotto (Hang Hxe1xbbx95): A connection of Ca Grotto with the length of 1,616xc2xa0m and the height of 46xc2xa0m Over Grotto (Hang Over): a 3,244xc2xa0m long, 103xc2xa0m high grotto, with the width from 30xe2x80x9350xc2xa0m. Pygmy Grotto (Hang Pygmy): This 845xc2xa0m long grotto has several streams falling from mounts.
Ruc Caroong Grotto (Hang Rxe1xbbxa5c Caroxc3xb2ng): This the habitat of Arem ethnic group.
This organization suggested that what remained in Bi Ky grotto may have been a Champa mosque from the 9th to 11th century.