Update README.md

README.md

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-license: cc-by-nc-sa-4.0
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+---
+license: cc-by-nc-sa-4.0
+---
+
+This repository contains the `C2Rust-Bench` dataset that is a minimized set of representative C functions for C-to-Rust transpilation. The `C2Rust-Bench` dataset is proposed for evaluating the C-to-Rust transpilers. This repo contains two files as following:
+
+### 1. `benchmark.json`
+This file contains a description of the `C2Rust-Bench` dataset, which includes:
+- 2,905 C functions and
+- detailed metadata about each of them.
+
+### 2. `Benchmark.tar`
+The `Benchmark.tar` file contains the C and Rust files used in the experiments. The `Benchmark` folder located in `Benchmark.tar` file contains following subfolders:
+- **`microbenchmark_set`**:
+  - This folder contains a small set of C and Rust functions transpiled using 9 different LLMs. This microbenchmarking set is used for a preliminary experiment.
+- **`large_set`**:
+  - This folder contains 15,503 C functions derived from 65 different programs and corresponding Rust functions transpiled using the selected LLM.
+- **`C2Rust-Bench`**:
+  - This folder contains the proposed C2Rust-Bench including C and corresponding Rust functions for transpilation evaluation.