Update README.md

README.md

@@ -18,3 +18,13 @@ from datasets import load_dataset
 
 dataset = load_dataset("PrathamOrgAI/ReadNet")
 ```
+
+### Data Fields
+
+- file: A path to the downloaded audio file in .flac format.
+
+- audio: A dictionary containing the path to the downloaded audio file, the decoded audio array, and the sampling rate. Note that when accessing the audio column: `dataset[0]["audio"]` the audio file is automatically decoded and resampled to `dataset.features["audio"].sampling_rate`. Decoding and resampling of a large number of audio files might take a significant amount of time. Thus it is important to first query the sample index before the `"audio"` column, *i.e.* `dataset[0]["audio"]` should **always** be preferred over `dataset["audio"][0]`.
+
+- text: the transcription of the audio file.
+
+- id: unique id of the data sample.