Update README.md

README.md

@@ -13,7 +13,13 @@ size_categories:
 ### Dataset Summary
 
 This dataset is a set of samples for testing the spell checker, grammar error correction and ungrammatical text detection models.
-I assembled this set by hand from various sources.
+
+The dataset contains two splits:
+
+test.json contains samples hand-selected to evaluate the quality of models.
+
+train.json contains synthetic samples generated in various waysю
+
 The purpose of creating the dataset was to test an internal spellchecker for [a generative poetry project](https://github.com/Koziev/verslibre), but it can also be useful in other projects, since it does not have an explicit specialization for poetry.
 You can consider this dataset as an extension of [RuCOLA](https://huggingface.co/datasets/RussianNLP/rucola), because the dataset format is made as compatible as possible.
 In addition, for some samples there is a corrected version of the text ("fixed_sentence" field), so it can be used as an extension of datasets in [ai-forever/spellcheck_benchmark](https://huggingface.co/datasets/ai-forever/spellcheck_benchmark).
@@ -74,6 +80,8 @@ A few poetry samples are included in this version:
 
 ### Statistics
 
+Statistics for test split of the dataset.
+
 Domains:  
 prose	5238  
 poetry	609