chunk_content: r semantic similarity
  	
  The dataset we’ll be using is a small subset of the esci-data dataset (it can be found on Hub at smangrul/amazon_esci).
  Each sample contains a tuple of (query, product_title, relevance_label) where relevance_label is 1 if the product matches the intent of the query, otherwise it is 0. 
  Our task is to build an embedding model that can retrieve semantically similar products given a product query.
  This is usually the first 