Task: Text Matching
Input (English): Sentence1: What is the difference between Refractory Chronic Migraines and Transformed Migraines? With CM do I need a headache specialist for general nuero? 
 Sentence2: My friend was diagnosed with transformed migraine recently by her headache specialist. She believes she has refractory chronic migraine, can you tell me what are the chances for refractory chronic migraine to become transformed migraine, if any?
Output (English): Dissimilar