Update README.md

README.md

@@ -17,9 +17,14 @@ each sample is at most 30 seconds
 ```
 
 ### Dataset structure
-**Every example has the following: 
-**audio** - the waveform  
-**rate** - the sampling rate of the waveform  
-**file_id** - the id of the speaker  
-**duration** - the duration of the video in seconds  
-**sentence** - the transcript of the video  
+Every example has the following:  
+**num_speakers** - the number of speakers    
+**utter** - list of utterences data  
+**audio** - the waveform of the audio  
+
+Each entry in the **utter** is a dict and has the following structure:  
+**start** - the starting position in **audio** of the speaker audio  
+**end** - the ending position in **audio** of the speaker audio  
+**file_id** - the identificator of the speaker  
+**sentence** - the transcription  
+**rate** - has to be the same across all examples in the dataset, if not something bad happened