Based on the previous function explanation, write a Python function named ```fetch_data``` that takes in a session as an argument and uses SQLAlchemy queries to fetch the relevant data from the database. Do not assume any imports for the ORMs themselves. The ORM is provided in the following code:
```python
{orm_code}
```

Please provide only the function code. For any queries you make using SQLAlchemy, also make sure to include any necessary imports. Remember that the function signature should be the following:
```python
def fetch_data(session: Session):
    ...
```