Describe the chirality conformer generation in the dataset card

README.md

@@ -155,12 +155,18 @@ evaluators and the expected embedding formats.
 
 ## Provenance
 
-The paper (Section 3 and Appendix C.1) describes how each dataset was built.
-
-- **`chirality`** is derived from **ChEMBL** (Gaulton et al., 2012). It uses drug-like molecules with annotated
-  stereocenters. The authors enumerated the stereoisomers and geometry-optimized them with xTB. Stereoisomers failing
-  R/S validation after optimization were removed. Small torsional perturbations were then applied, followed by
-  GFN-xTB optimization. Any conformer whose R/S assignment changed was discarded.
+How each dataset was built:
+
+- **`chirality`** is derived from **ChEMBL** (Gaulton et al., 2012), using drug-like molecules with annotated
+  stereocenters. Their stereoisomers were enumerated with RDKit, embedded with ETKDG and geometry-optimized once
+  with `xtb --opt lax`, giving 15,218 stereoisomers with one optimized geometry each. The 52,391 conformers
+  released here were derived from those geometries: hydrogens were re-added at RDKit's idealized geometry,
+  rotatable bonds were rotated by a small random torsion (median about 10-12 degrees per bond), and isotropic
+  Gaussian noise of sigma about 0.09 A was added to every atom. A conformer was kept only if its heavy-atom RMSD
+  to every already-accepted conformer of the same stereoisomer exceeded 0.350 A, up to 20 per stereoisomer, so
+  stereoisomers with no rotatable bond carry exactly one conformer, as do 34% of the 14,903 stereoisomers overall.
+  Every released conformer reproduces the CIP (R/S) assignment of its source geometry, as re-perceived from 3D
+  with RDKit.
 - **`rotation`** (the geometry dataset) was **generated by the 3DCS authors**. It is a combinatorial library of
   bi-aryl/heteroaryl scaffolds decorated with substituents. RDKit was used for fragment connection, sanitization and
   ETKDG 3D seeding. Each molecule has an xTB relaxed dihedral scan around the inter-ring single bond in 2.5°