Update README.md

README.md

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 - [MedCPT Query Encoder](https://huggingface.co/ncbi/MedCPT-Query-Encoder): compute the embeddings of short texts (e.g., questions, search queries, sentences).
 - [MedCPT Article Encoder](https://huggingface.co/ncbi/MedCPT-Article-Encoder): compute the embeddings of articles (e.g., PubMed titles & abstracts).
 
-**MedCPT has been pre-trained by an unprecedented scale of 255M query-article pairs from PubMed search logs**, and has been shown to achieve the state-of-the-art performance on several zero-shot biomedical IR datasets. In general, there are three use cases:
+**This repo contains the MedCPT Query Encoder.**
+
+**MedCPT has been pre-trained by an unprecedented scale of 255M query-article pairs from PubMed search logs**, and has been shown to achieve state-of-the-art performance on several zero-shot biomedical IR datasets. In general, there are three use cases:
 1. Query-to-article search with both encoders.
 2. Query representation for clustering or query-to-query search with the [query encoder)[https://huggingface.co/ncbi/MedCPT-Query-Encoder].
 3. Article representation for clustering or article-to-article search with the (prticle encoder)[https://huggingface.co/ncbi/MedCPT-Article-Encoder].