Update README.md

README.md

@@ -32,6 +32,7 @@ Goal: a model that can be used for a general-purpose summarizer for academic and
 ## Usage 
 Check the colab notebook for desired usage
 **The model expects a prompt prepended to the source document to indicate the type of summary**, examples of prompts used to train the model here:
+Prompts should be formatted with a colon at the end so that the input to the model is formatted as e.g. "Summarize the following: {input_text}". Note this model was trained with far fewer prompts than models like `flan-t5-11b-summarizer-filtered` so new prompts might not generalize as well.
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