This is a list of annotated PetScan example queries. Please use ;PSID:description as wiki syntax to add more.

552
A list of all cats known to Wikidata that are also in the category tree of the battleship "Bismarck" on English Wikipedia. Currently, only "Unsinkable Sam".
806
People who died in the 20th century without a Wikidata item (enwiki). Use this to create new items or add to existing items by following links to Duplicity. Make sure to authorize Widar before running the query.
23471
same for plwiki.
26251
same for zhwiki.
27177
same for svwiki.
28525
same for enwiki.
29097
same for jawiki.
36444
same for frwiki.
47349
same for arwiki.
49883
People born in the 1980s without a Wikidata item (enwiki). Use this to create new items or add to existing items by following links to Duplicity. Make sure to authorize Widar before running the query.
49910
Wikiquote pages in category "Polscy tłumacze" without a Wikidata item. Use this to create new items or add to existing items by following links to Duplicity. Make sure to authorize Widar before running the query.
13806
Articles in category "BioBot" without items (itwiki). Use this to create new items or add to existing items by following links to Duplicity. Make sure to authorize Widar before running the query.
71637
Items linking to Creator namespace at Commons.
86895
All pages on Portuguese Wikisource that are on namespace "Autor" (autor).
148910
All items for people (P31=Q5) without P106, but in Category:Politicians by nationality (depth=1). This can be used to add P106:Q82955 and edited to use for other occupations/categories.
595690
Danish verbs and nouns that are homographic (i.e. spelled the same).
3530387
Populated places without a Wikidata item (ruwiki).
15797785
Files that are listed in category A and B (here categories Featured pictures on Wikimedia Commons and Quality images).
24586284
All articles on fiwiki without a Wikidata item.
24725217
All articles on ukwiki created for last 7 days (168 hours).
25089572
Find a lot of pages without dutch sister, ranked by links towards them. useful for translation.