query with custom unit
Correct:
{{#ask:
[[Category:City]]
[[Area::+]]
|?Area
|mainlabel=City
|format=csv
}}
CSV
query omitting the custom unit
Wrong (includes custom unit though omitted):
{{#ask:
[[Category:City]]
[[Area::+]]
|?Area#-n
|mainlabel=City
|format=csv
}}
CSV