Implement get_qa_pair to get Q&A formats

[mfekadu]

Objective

The get_qa_pair function is vital for

1. Training the QA model
2. Performing variable substitution on answer formats

Key Result

Create this function within the NimbusMySQLAlchemy class

Details

• see other methods of that class, which are named get_... for reference on how to create this function

• see the SQLAlchemy documentation on session.query