Update README.md to include input format

README.md

@@ -13,3 +13,12 @@ SciTulu is a collection of instruction-following language models targeting scien
 Training and evaluation code for SciTulu is available in our GitHub repository: https://github.com/allenai/SciRIFF.
 
 See the [Tulu model card](https://huggingface.co/allenai/tulu-2-7b) for more information on potential risks, biases, and limitations.
+
+## Input Format
+
+Tulu-family models require inputs formatted like `<|user|>\n{{ input }}\n<|assistant|>`
+```
+<|user|>
+Your message here!
+<|assistant|>
+```