Update README.md

README.md

@@ -105,7 +105,9 @@ ds = load_dataset("yairschiff/qm9")
 #   https://moleculenet.org/datasets-1
 test_size = 0.1
 seed = 1
-dataset.train_test_split(test_size=test_size, seed=seed)
+ds.train_test_split(test_size=test_size, seed=seed)
+
+# Use `ds['canonical_smiles']` from `rdkit` as inputs.
 ```