Update README.md

README.md

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 # Dataset Card for "tner/ttc"
 
+***WARNING***: This is a dummy dataset for ttc and the correct one is [`tner/ttc`](https://huggingface.co/datasets/tner/ttc), which is private since **TTC dataset is not publicly released at this point**. We will grant you an access to the `tner/ttc` dataset, once you retained the original dataset from the authors (you need to send an inquiry to Shruti Rijhwani, srijhwan@cs.cmu.edu). See their repository for more detail [https://github.com/shrutirij/temporal-twitter-corpus](https://github.com/shrutirij/temporal-twitter-corpus).
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 ## Dataset Description
 
 - **Repository:** [T-NER](https://github.com/asahi417/tner)