results shown as ??? (three questions marks)

[kevincfz]

Sometimes the output is shown as ??? (three question marks), the given wikidata id when looked up in wikidata website does not exist, but instances and other information exist.

Is this a bug?

For example,

wdtaxonomy Q2516517

Returns

transport sciences (Q2516517) •2 ↑
├──intelligent transportation system (Q508378) •23
├──transport economics (Q660564) •9 ↑
├──transport engineering (Q775325) •22 ↑
│  └──traffic engineering (Q1640676) •13
│     └──Technology of rail vehicles (Q2234610) •2 ↑
├──transportation geography (Q795612) •19 ↑
├──transport planning (Q1034047) •16 ×2 ↑
├──??? (Q1230796) •1 ↑
├──??? (Q1308085) •3 ↑↑
├──traffic psychology (Q1362446) •12 ↑
├──transport law (Q1996243) •8 ↑
├──effects of the automobile on societies (Q2215004) •3
├──??? (Q2516123) •2 ↑
├──traffic education (Q2516186) •2 ↑
├──Timeline of transportation technology (Q2516265) •5 ↑
├──??? (Q2516343) •1 ↑
├──??? (Q2516344) •1 ↑
├──??? (Q2516371) •1 ↑
├──??? (Q2516390) •1 ↑
├──??? (Q2516430) •1 ↑
├──transport ecology (Q2516529) •1 ↑
├──??? (Q20820139) •1
└──??? (Q20850681) •1 ↑

[nichtich]

The question marks indicate a missing label in the selected language. Try for instance wdtaxonomy -l de Q2516517 to get the German labels or wdtaxonomy -l en,de Q2516517 to get English labels or German if there is no English label.

[kevincfz]

Thanks for the feedback