Update README.md

README.md

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 ## CC_FILTER
-this is ja cc filter fo reference from ja wiki vs random ja mc4, and build with following procedure.
+this is ja cc filter for reference from ja wiki vs random ja mc4, and build with following procedure.
 1. get ja wiki dump file, and extract the all url inside, get about 4M urls
 2. crawl 300K of 4M webpages from the urls
 3. get pure text and remove content len less than 1k,