@ -141,7 +141,7 @@ How many airports are directly connected to `FRA`?
How many airports are reachable from `FRA` by one stop?
```
?[count_unique(to)] := *route{fr: 'FRA', to: 'stop},
?[count_unique(to)] := *route{fr: 'FRA', to: stop},
*route{fr: stop, to}