Create README.md

README.md

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+## data-intermediate
+
+Because some json files are huge, we use tar.zst to package the data.
+
+1. to compress the data
+
+```bash
+tar -I 'zstd' -cvf data-intermediate.tar.zst --exclude='*.md' data-intermediate/ # exclude README.md and challenging_parsing.md
+```
+
+2. to decompress the data to `your_folder/`
+
+first you should make sure `your_folder/` exist. If not, create it.
+
+silently
+```bash
+tar -I 'zstd -d' -xf data-intermediate.tar.zst -C your_folder/
+```
+or, with progress verbose
+```bash
+zstd -d -c data-intermediate.tar.zst | tar -xvf - -C your_folder/
+```