Update README.md

README.md

@@ -3,4 +3,14 @@ license: apache-2.0
 language:
 - en
 ---
-All of the data together is around 41GB. It's the last hidden states of 131,072 samples from refinedweb padded/truncated to 512 tokens on the left, fed through [google/flan-t5-small](https://hf.co/google/flan-t5-small). Included are the columns "text", "encoding" and "attention_mask" which are all pretty self explanatory.
+All of the data together is around 41GB. It's the last hidden states of 131,072 samples from refinedweb padded/truncated to 512 tokens on the left, fed through [google/flan-t5-small](https://hf.co/google/flan-t5-small).
+
+Structure:
+
+```
+{
+  "encoding": List, shaped (512, 512) aka (tokens, d_model),
+  "text": String, the original text that was encoded,
+  "attention_mask": List, binary mask to pass to your model with encoding to not attend to pad tokens
+}
+```