add note about newlines

README.md

@@ -151,6 +151,8 @@ size_categories:
 We release all evaluation data and scripts for further analysis and reproduction of the accompanying paper: [A comparison of translation performance between DeepL and Supertext](https://arxiv.org/abs/2502.02577).
 The data consists of document-level translations by Supertext and DeepL as well as accompanying ratings by professional translators. Please find more details in the paper.
 
+Please note that the empty lines correspond to paragraph boundaries (i.e., double line breaks) in the original documents.
+
 ``` python
 # for each language pair, there is a separate subset
 data = load_dataset("Supertext/mt-doclevel-ab-test", "en-deCH")