Semantic Mediawiki: writing a query that returns all the suboject defined in a page

Question

I've implemented a page with a long list of subojects. The properties are correctly visibile. Now I'm trying to query that list but my first query attempt doesn't work.

{{#ask:
 [[Categoria:Marco Crepaldi]]
 |?Titolo
}}

{{#ask:[[Has subobject::text property]]
 |?Titolo
}}

Answer 1

I've found the solution with the help of @IRA1777

{{#ask:
 [[-Has subobject::{{FULLPAGENAME}}]] 
 |?Tags
 |?Titolo
 | mainlabel=-
}}

MainLabel removes the first column (which was filled with the name of the page containing the subobjects)

For who understands SQL the query reads more or less as:

SELECT Tags, Titolo
FROM subobject s
WHERE s.ParentPage = {{FULLPAGENAME}}