Fixing critical documentation error

official/recommendation/ranking/README.md

@@ -96,9 +96,9 @@ Training and eval datasets are expected to be saved in many tab-separated values
 (TSV) files in the following format: numberical fetures, categorical features
 and label.
 
-On each row of the TSV file first `num_dense_features` inputs are numerical
-features, then `vocab_sizes` categorical features and the last one is the label
-(either 0 or 1). Each i-th categorical feature is expected to be an integer in
+On each row of the TSV file, the first one is the label
+(either 0 or 1), the next `num_dense_features` inputs are numerical
+features, then `vocab_sizes` categorical features. Each i-th categorical feature is expected to be an integer in
 the range of `[0, vocab_sizes[i])`.
 
 ## Train and Evaluate