Update README.md

README.md

@@ -25,7 +25,7 @@ license: cc-by-4.0
 # CellMap 2D
 
 This dataset contains all 2D slices from the EM volumes used in the [CellMap segmentation challenge](https://cellmapchallenge.janelia.org/). 
-The dataset contains all *x*, *y*, *z* slices obtained from a total of 289 3D crops (the crops come from 22 different samples). 
+The dataset contains all *x*, *y*, *z* slices obtained from a total of 289 3D EM volume crops (the crops come from 22 different samples). 
 The slices are in their native resolution (no resizing).  
 
 You can load the dataset as follows (*non-streaming* mode):