Update README.md

README.md

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 This dataset is a curated version of the [Natural Questions open dataset](https://huggingface.co/datasets/nq_open), 
 with the inclusion of the gold documents from the original [Natural Questions](https://huggingface.co/datasets/natural_questions) (NQ) dataset.
 The main difference with the NQ-open dataset is that some entries were excluded, as their respective gold documents exceeded 512 tokens in length.
-This is due to the pre-processing of the gold documents, whose explanation can be found in this other [dataset](https://huggingface.co/datasets/florin-hf/wiki_dump2018_nq_open).
+This is due to the pre-processing of the gold documents, as detailed in this related [dataset](https://huggingface.co/datasets/florin-hf/wiki_dump2018_nq_open).
 
-It's designed to facilitate research in question-answering systems, especially focusing on integrating gold documents for training and testing purposes.
+The dataset is designed to facilitate research in question-answering systems, especially focusing on integrating gold documents for training and testing purposes.
 
 
 ## Dataset Sources