Update README.md

README.md

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 pretty_name: Liechtenstein historical text dataset
 size_categories:
 - 1K<n<10K
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+All of the articles of the Liechtenstein historical encyclopaedia are contained in this dataset in textual form. Additionally, the historical and cultural publications and books gathered from eliechtensteinen-sia.li are also included. Only one column called “text” is contained in the dataset. The dataset is published exclusively in German language and around 17’000 rows are included in the dataset.
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+The dataset is intended as is to be used for pretraining. However, further data cleaning is neccessary to get satisfactory results, since empty lines exist and the text inside the lines contains formatting errors like misspelled words or missing spaces, as most of the text is generated from PDFs via OCR.
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+The data sources used for creating the dataset are listed below. All sources are available publicly and can be accessed via web-links.
+Most comprehensible encyclopaedia about history of Liechtenstein: https://historisches-lexikon.li/
+Book explaining the history of Liechtenstein: https://www.eliechtensteinensia.li/viewer/fulltext/000475482/2/
+Publication about the history of Liechtenstein until 2006: https://www.eliechtensteinensia.li/view-er/image/000469038/1/LOG_0000/
+Publication about political and societal devel-opment of Liechtenstein: https://www.eliechtensteinensia.li/view-er/image/000469289/1/LOG_0000/
+Documentary book about the history of Liech-tenstein: https://www.eliechtensteinensia.li/view-er/image/000468149/1/LOG_0000/