Delete all nested triples

[ganesh chandra]

Hello All,
My data looks something like this:
<http://www.example.com/example/123456789> a something:Entity ;
    something:privateData [ a something:PrivateData ;
            something:jsonContent "{\"fileType\": \”jp\"}"^^xsd:string ;
            something:modeData [a something:data1
            system:code 1234]
            something:system <http://www.test.edu/fileType> ] ;

There are many like the above one and I am trying to write the query to delete 
all the data if the id matches. How I should I go about doing this?

Regards,
Ganesh