Update README.md

README.md

@@ -20,7 +20,7 @@ Below, we provide a breakdown of the original composition of these two splits, w
 | `train/`      | **32,996** |     112 |              5,781 |
 | `train_more/` | 49,227 |     111 |              5,805 |
 
-The tables below give the number of trajectories for each initial condition (ic{1-16}) in the original two dataset splits that we combined into "train.parquet"
+The tables below give the number of trajectories for each initial condition (ic{1-16}) in the original two dataset splits that we combined into "train.parquet". Each ic{1-16} has fewer than the number of perturbed systems because some trajectories may not have passed our fixed integration time-limit, or our filters.
 
 **train**
 | ic1 |  ic2 |  ic3 |  ic4 |  ic5 |  ic6 |  ic7 |