State that this is a sample; catalogue diversity and gender split

README.md

@@ -62,6 +62,8 @@ configs:
 > **Human-validated transcription is available on demand for this data.**
 > Word-level forced alignment included, as shipped in [cebuano-speech](https://huggingface.co/datasets/SilencioNetwork/cebuano-speech) and [tagalog-filipino-speech](https://huggingface.co/datasets/SilencioNetwork/tagalog-filipino-speech). Available for this sample, for a larger subset of the same language, or for commissioned collection — **hello@silencio.network**
 
+> **This is a sample, not the catalogue.** It is drawn to show format, audio quality and metadata, and its speaker mix does not represent what Silencio holds. The off-the-shelf catalogue behind it is far more diverse across regions, age groups, accents and recording conditions. Men are 40% of the speakers in this sample. Across the catalogue the gender split is roughly 40% female to 60% male, with men in the majority in most languages. Licensed subsets can be drawn to a specified gender, age or regional balance.
+
 ## What this is for
 
 This release carries no transcripts, so it is **not** a supervised ASR set and is no longer tagged as one. It is a small protocol sample. Plainly, what it is and is not good for: