Change Task to Predict (User, Rating) tuples

[simon376]

for now the network trains on all columns:

• Book Information (Title, Description, ID)
• Author ID
• Review Information (Text, Rating)
• User ID

and predicts a rating based on this information, which is then used for overall ranking.

but the end goal should be to have a query and a candidate model (similar to a Retrieval Task), where Books (Book IDs + Metadata + associated Reviews) should be rated based on the user-query (User ID) for this specific user!