Update README.md

README.md

@@ -24,12 +24,13 @@ This dataset is a collection of question-answer pairs, collected from Google. Se
   Columns: "question", "answer", "category"
   Column types: str, str
   Examples:
-
+```
   {
     'question': 'is toprol xl the same as metoprolol?',
     'answer': 'Metoprolol succinate is also known by the brand name Toprol XL. It is the extended-release form of metoprolol. Metoprolol succinate is approved to treat high blood pressure, chronic chest pain, and congestive heart failure.',
     'category': 'Chemistry'
   }
+```
 
 ## Method of categorization