```json
{
  "TragedyDegree": 3,
  "ComedyDegree": 5
}
```

The story of Eliza and the town of Riverwood is relatively light-hearted with moments of intrigue and mystery. There are only mild emotional setbacks or tense moments, placing the Tragedy Degree at 3. The story ends on a positive, uplifting note with Eliza successfully uncovering the town's past and contributing to its collective knowledge, making the ending satisfying and emotionally delightful, which justifies a Comedy Degree of 5.
