# Q3 — courses per student

Aggregation shape. Alice (2 courses), Bob (1), Eve (1).

Hand-computed expected output:

```jsonl
{"student": "http://www.University0.edu/Alice", "n": "2"}
{"student": "http://www.University0.edu/Bob",   "n": "1"}
{"student": "http://www.University1.edu/Eve",   "n": "1"}
```
