```
% pandoc -f latex -t native --citeproc
\cite[„Etwas […{]} auslassen“]{key}
^D
[WARNING] Citeproc: citation key not found
[Para [Cite [Citation {citationId = "key", citationPrefix = [], citationSuffix = [Str "\8222Etwas",Space,Str "[\8230",Span ("",[],[]) [Str "]"],Space,Str "auslassen\8220"], citationMode = NormalCitation, citationNoteNum = 0, citationHash = 0}] [Str "(",Strong [Str "key?"],Str "\8222Etwas",Space,Str "[\8230",Span ("",[],[]) [Str "]"],Space,Str "auslassen\8220)"]]]
```