Sync with paper v2: subset manifest, comparable corpus sizes

README.md

@@ -66,7 +66,11 @@ competition-math tranche will ship as v1.1.
 **Fields**: `id`, `src` (source dataset), `question_en`, `cot_en` (solution;
 null for AceReason-Math), `question_hy`, `cot_hy`, `gold`, `answer_type` (`numeric`/`mc`/`freeform`),
 `solver_limited` (bool, see gate G2 below), `translator`, `attempts`.
-Rejected items and per-stage rejection statistics ship in `stats/`.
+Rejected items and per-stage rejection statistics ship in `stats/`, together
+with `stats/cpt_training_subset_ids.txt`, the 104,630 ids of the CPT
+training subset that appear verbatim in this release (the remaining 5,255
+OpenScience items of that subset were superseded by revised translations
+before release).
 
 ## Pipeline