Incorrect question/answer for 12864 (prompt asks for dates + column C, golden has neither)

[swenyang]

Task: 12864 (Verified-400)

The prompt is inconsistent with the golden answer in two ways:

1. "dates" that don't exist. The prompt says "retrieve corresponding
   dates from Column B on sheet 2 by matching Column D on sheet 1." But the
   value actually returned (Sheet1 Column B, header "Deal Name") is
   Monthly / Daily / Quarterly — these are reporting frequencies, and
   there are no dates anywhere in the workbook. The word "dates" mislabels
   the lookup target and makes the task ambiguous.

2. Column C is requested but absent from the golden. The prompt says "I
   require the associated data from both Column B and C on sheet 2." The
   golden's Sheet2 has no Column C at all (not even a header) — it fills
   only Sheet2!B2:B12 with
   =INDEX(Sheet1!B$2:B$17, MATCH($A2, Sheet1!$D$2:$D$17, 0)).

answer_position is 'Sheet2'!B2:B12, so scoring only checks Column B — that
part is self-consistent and scoreable. But the prompt's references to "dates"
and "Column C" match neither the data nor the golden, which makes the intended
task ambiguous.

Suggested fix:

• Replace "dates" with "deal name" (the actual header of the looked-up
  column, Sheet1!B1 / Sheet2!B1), so the prompt matches the workbook's own
  labels and the golden. (If a value-accurate term is preferred, the values are
  reporting frequencies, e.g. "reporting frequency".)
• Either drop the "Column C" clause, or extend the golden to include the
  Column C the prompt asks for.