Update README.md

README.md

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 We conducted extensive experiments using widely recognized TREC query sets and multiple languages. Our results, evaluated using various metrics, demonstrate the effectiveness of backtranslation in creating high-quality benchmark datasets for evaluating query refinement methods.
 
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   * [`search`](#search)
   * [`eval`](#eval)
   * [`agg, box`](#agg-box)
-- [3. Gold Standard Datasets](#3-gold-standard-datasets)
-  * [File Structure](#file-structure)
-  * [Settings](#settings)
-  * [Stats](#stats)
-  * [Samples](#samples)
 - [4. Acknowledgement](#4-acknowledgement)
 - [5. License](#5-license)
-- [6. Citation](#6-citation)
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+<td ><img src='./misc/flow.png' width="100%" /></td>
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-![image](misc/flow.png)
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 ## 1. Setup
 You need to have ``Python=3.8`` and install [`pyserini`](https://github.com/castorini/pyserini/) package (needs `Java`), among others listed in [``requirements.txt``](requirements.txt).