Update README.md

README.md

@@ -84,18 +84,20 @@ An example of `training` looks as follows:
 
 #### default
 
-An example of `training` looks as follows:
+The data fields are the same among all splits. An example of `training` looks as follows:
 
-- `prediction_ts`:
-- `age`:
-- `gender`:
-- `context`:
-- `text`:
-- `label`:
+- `prediction_ts`: a `float` feature.
+- `age`: an `int` feature.
+- `gender`: a `string` feature.
+- `context`: a `string` feature.
+- `text`: a `string` feature.
+- `label`: a `ClassLabel` feature, with possible values including negative(0) and positive(1).
 
 ### Data Splits
 
-[More Information Needed]
+|   name   |training|validation|production |
+|----------|-------:|---------:|----------:|
+|  default |  9916  |   2479   |   40079   |
 
 ## Dataset Creation