update prompt:

prompts/summarize/user.txt

@@ -13,9 +13,10 @@
 
 # Format
 
-You should follow a Markdown format with two headings: "Relevant Parts", "Summary", "Question Difficulty".
+You should follow a Markdown format with two headings: "Question Sub-topic", "Relevant Parts", "Summary", "Question Difficulty".
+- The "Question Sub-topic" section should contain a concise, key-word based summary of the question.
 - The "Relevant Parts" section should include the copied text from the student's evaluation.
-- The "Summary" section should include a human-readable summary of the copied text.
+- The "Summary" section should include a 2 to 3 sentences human-readable summary of the copied text.
 - The "Question Difficulty" part should give an objective, unbiased evaluation of the relative difficulty of the quesiton. Rate it on a scale of 1-5.
 
 IMPORTANT Requirements: