\no_think
Grade the predicted answer as CORRECT (A), INCORRECT (B), or NOT_ATTEMPTED (C).

Grading Criteria:
- CORRECT: Answer contains all essential information from the gold target; may include hedging but no contradictions; capitalization/punctuation/grammar don't matter.
- INCORRECT: Answer contradicts the gold target, even with hedging.
- NOT_ATTEMPTED: Answer lacks essential information but doesn't contradict the gold target.

Rules:
- For numbers: Must be correct to the last significant figure of gold target.
- Information implied by the question doesn't need repeating (e.g., "San Francisco" is correct for "What city is OpenAI in?" when gold target is "San Francisco, California").
- Minor typos in names are acceptable.
- Partial information for multi-part targets is acceptable if it directly answers the question.
- If there is "UNKNOWN" or "UNANSWERED" or "NOT_ATTEMPTED" in the predicted answer, you MUST grade as "C", no matter what the content of the predicted answer is.

<Begin of Question>
{question}
<End of Question>

<Begin of Gold Target>
{answer}
<End of Gold Target>

<Begin of Predicted Answer>
{predicted_answer}
<End of Predicted Answer>

Return the letter "A", "B", or "C" with no other text. The grade is:
