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README.md

@@ -71,8 +71,9 @@ sequential counter drifts silently if the decoder ever skips a frame).
 
 ### Known limitations
 
-- Episodes whose round-1 caption came back `N/A` have an empty `text`; they are still in the
-  index. Filter on `text` if you only want captioned episodes.
+- Every episode here has an instruction. These episodes come from VITRA-1M's official
+  segmentation, which already drops the ones a captioner marks `N/A`; we measured 0
+  instruction-less episodes in this release.
 - Paraphrase count averages 2.09, not a fixed number. Past 3 the model starts inventing;
   a sentence with no prepositional phrase honestly supports only one or two.
 - Verified: every episode's stored frame count matches its index rows, and no index entry