chore: datasets make prompt invariant to num of refs

mvl-sib200.py

@@ -69,13 +69,13 @@ CATEGORIES: List[str] = [
 
 # Prompts for classification tasks
 IMG2SENT_PROMPT: str = (
-    "Which option best matches the topic of the reference images? "
+    "Which option best matches the topic of the reference image(s)? "
     'The available topics are "entertainment", "geograpy", "health", '
     '"politics", "science and technology", "sports", and "travel". '
     "Choose one from A, B, C, D and only output a single letter."
 )
 SENT2IMG_PROMPT: str = (
-    "Which option best matches the topic of the reference sentences? "
+    "Which option best matches the topic of the reference sentence(s)? "
     'The available topics are "entertainment", "geograpy", "health", '
     '"politics", "science and technology", "sports", and "travel". '
     "Choose one from A, B, C, D and only output a single letter."