Update README.md

README.md

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-# volga-ural-data
+# Four Battles corpus
+
+Release volga-ural contains partially annotated materials used in Jeremy Bradley's, Alexandra Kellner's and Niko Partanen's paper *Variation in word order in Permic and Mari varieties: a corpus-based investigation* at symposium "Language contacts of the nations of Volga-Ural region", Cheboksary, 21–24.5.2018.
+
+Part of the Komi annotations are also in the Universal Dependencies [Komi-Zyrian treebank](https://github.com/UniversalDependencies/UD_Komi_Zyrian-Lattice/).
+
+The links to original data in National Library of Finland's Fenno-Ugrica collection are as follows:
+
+Komi-Zyrian: http://urn.fi/URN:NBN:fi-fe2014102045428
+Komi-Permyak: http://urn.fi/URN:NBN:fi-fe2014101045137
+Udmurt: http://urn.fi/URN:NBN:fi-fe2014092444879
+Hill Mari: http://urn.fi/URN:NBN:fi-fe2014100345029
+
+The materials in Fenno-Ugrica are licensed as Public Domain.
+
+The Russian translations provided with the corpora are available from [publ.lib.ru](http://publ.lib.ru/ARCHIVES/U/USPENSKIY_Lev_Vasil'evich/_Uspenskiy_L.V..html#009) archive, where it is released on non-commercial license.