Description: SELECT query with FILTER() and ORDER BY

Code:

<pl format="sparql">
PREFIX wiki:   <>
SELECT ?page ?lang ?length
WHERE 
  { 
     ?page a "querytest".
     ?page wiki:test_lang ?lang.
     ?page wiki:test_length ?length.
     FILTER (?lang!='polish')
  }
ORDER BY INC(?length)
LIMIT 5
</pl>

Expected result:

Actual result:

Description: Simple ASK queries

Code:

Are there any pages not in polish?
<pl format="sparql">
PREFIX wiki: <>
ASK {
     ?page a "querytest".
     ?page wiki:test_lang ?lang.
     FILTER (?lang!='polish')
}
</pl>
 
Are there any pages from year 2000? 
<pl format="sparql">
PREFIX wiki: <>
ASK {
     ?page a "querytest".
     ?page wiki:test_year ?year.
     FILTER (?year='2000')
}
</pl>

Expected result:

Are there any pages not in polish? yes

Are there any pages from year 2000? no

Actual result:

Are there any pages not in polish? no

Are there any pages from year 2000? no

Describe: Describe pages that are linked (as test_other_page) in other pages.

Code:

<pl format="sparql">
PREFIX wiki: <>
DESCRIBE ?other 
WHERE {
  ?page a "querytest" ;
         wiki:test_other_page ?other .
}
</pl>

Expected result:

Actual result: