Update README.md

README.md

@@ -110,8 +110,10 @@ This dataset is primarily intended for unsupervised training of text generation
   * `chapters`: number of chapters (corresponds to `general_all_no` from the Syosetu API)
   * `keywords`: array of novel keywords (corresponds to `keyword` from the Syosetu API, split on spaces)
   * `isr15`: whether the novel is rated R15+
-  * `genre`: novel genre ID (see Syosetu API documentation)
-  * `biggenre`: general novel genre ID (see Syosetu API documentation)
+  * `genre`: novel genre ID (optional, see Syosetu API documentation)
+  * `biggenre`: general novel genre ID (optional, see Syosetu API documentation)
+  * `isr18`: whether the novel is rated R18+
+  * `nocgenre`: novel genre ID (optional, only available if `isr18` is true, see Syosetu API documentation)
  
 *For further reference, see the Syosetuka ni Narou API documentation: <https://dev.syosetu.com/man/api/> (JA).*