docs(README): add instructions for running preparation script

README.md

@@ -56,14 +56,11 @@ configs:
 
 ## Dataset Usage
 
-This version of the dataset is prepared by combining the [JSON annotations](https://github.com/zwenyu/SPHERE-VLM/tree/main/eval_datasets/coco_test2017_annotations) with the corresponding images from [MS COCO-2017](https://cocodataset.org). The script used can be found at `prepare_parquet.py`.
+This version of the dataset is prepared by combining the [JSON annotations](https://github.com/zwenyu/SPHERE-VLM/tree/main/eval_datasets/coco_test2017_annotations) with the corresponding images from [MS COCO-2017](https://cocodataset.org).
+The script used can be found at `prepare_parquet.py`, to be executed in the root of [our GitHub repository](https://github.com/zwenyu/SPHERE-VLM).
 
 Please note that the images are subject to the [Terms of Use of MS COCO-2017](https://cocodataset.org/#termsofuse):
 
 > Images
 > 
 > The COCO Consortium does not own the copyright of the images. Use of the images must abide by the Flickr Terms of Use. The users of the images accept full responsibility for the use of the dataset, including but not limited to the use of any copies of copyrighted images that they may create from the dataset.
-
-## Evaluation
-
-For the code used to evaluate VLMs on our dataset, please see our GitHub repository at https://github.com/zwenyu/SPHERE-VLM.