Update README.md

README.md

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 license: cc-by-nc-sa-4.0
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 ## Introduction
-This is a class-balanced version of subset from CSFD sentiment dataset colleted from Facebook. The work was originaly published in paper Sentiment Analysis in Czech Social Media Using Supervised Machine Learning (citation below).
+This is a class-balanced version of subset from CSFD sentiment dataset collected from Facebook. The work was originaly published in paper Sentiment Analysis in Czech Social Media Using Supervised Machine Learning (citation below).
 
 ## Format