Updated ReadME with model card information

README.md

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-license: cc-by-nc-nd-4.0
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+# Overview
+This is the C2S-Pythia-410m-cell-type-prediction model, based on the Pythia-410m architecture developed by EleutherAI, 
+fine-tuned using Cell2Sentence (C2S) on a diverse set of single-cell RNA sequencing (scRNA-seq) datasets from CellxGene 
+and the Human Cell Atlas. Cell2Sentence is an innovative approach for adapting large language models (LLMs) to 
+single-cell biology by transforming scRNA-seq data into "cell sentences"—sequences of gene names ordered by 
+expression levels. This transformation enables LLMs to leverage their natural language processing capabilities for 
+various single-cell tasks, with a focus on cell type prediction in this model.
+
+# Training Data
+This model was trained on over 57 million human and mouse cells gathered from over 800 single-cell RNA sequencing 
+datasets from CellxGene and the Human Cell Atlas. This dataset covers a broad range of cell types and conditions
+from multiple tissues in both human and mouse.
+
+# Tasks
+This model is designed for:
+- Cell type prediction: Predicting the cell type based on the "cell sentence" generated from scRNA-seq data.
+
+# Cell2Sentence Links
+- GitHub: https://github.com/vandijklab/cell2sentence
+- Paper: https://www.biorxiv.org/content/10.1101/2023.09.11.557287v3
+
+# Pythia Links
+- Paper: https://arxiv.org/pdf/2304.01373
+- Hugging Face: https://huggingface.co/EleutherAI/pythia-410m