## Description
[] For `wikilambdasearch_labels`: the return type should be `Z4`
[] Consider whether there are other implications for filter functions and special pages
## Open questions
[] Should type be Z4. As in 'wikilambdasearch_type=Z4' ? Because it already returns when 'wikilambdasearch_return_type=Z4'. The Frontend uses the wikilambdasearch_type=Z4' in the ZObjectSelector
[] Add more detailed description + Acceptance criteria to this ticket
[] We should describe the other implications. Unsure what Special Pages might be implicated here
**Desired behavior/Acceptance criteria**
* [ ] ...
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## Completion checklist
* [ ] Before closing this task, review one by one the checklist available here: https://www.mediawiki.org/wiki/Abstract_Wikipedia_team/Definition_of_Done#Front-end_Task/Bug_Completion_Checklist