missing punctuation

README.md

@@ -295,7 +295,8 @@ reference genome into 200 bp non-overlapping chunks. If the 200 bp chunk overlap
 or more with a contiguous region from the set of annotated cis-regulatory elements (promoters or
 enhancers), we label them as positive, else the chunk is labeled as negative. The resulting dataset
 was composed of ∼15M negative samples and ∼50k positive promoter samples and ∼1M positive
-enhancer samples We randomly sub-sampled the negative set to 1M samples, and kept all positive
+enhancer samples. We randomly sub-sampled the negative set to 1M samples, and kept 
+all positive
 samples, to make this dataset more manageable in size.
 
 #### Task Structure