`cut` is fine for a single column, but it cannot filter rows or rename
headers. `awk -F'\t'` does both and keeps the field separator explicit.

```bash
# third column, only rows where the second column is "passed"
awk -F'\t' '$2 == "passed" { print $3 }' results.tsv

# same thing, but print the header too
awk -F'\t' 'NR == 1 || $2 == "passed"' results.tsv
```

`NR == 1` prints the header line. It is worth remembering that awk treats a
missing final field as an empty string, so `$3` on a short row prints nothing
rather than failing.