Question: What film production company is the subsidiary of the film production studio whose official website is http://www.hbo.com (this statement's language is English)?
Choices: Lucasfilm
Orion Pictures
American Zoetrope
American International Pictures
Warner Bros.
Paramount Pictures
Castle Rock Entertainment
New World Pictures
HBO Films
Hollywood Pictures
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "film production company" . ?e <parent_organization> ?e_1 . ?e_1 <pred:instance_of> ?c_1 . ?c_1 <pred:name> "film production company" . ?e_1 <official_website> ?pv . ?pv <pred:value> "http://www.hbo.com" . [ <pred:fact_h> ?e_1 ; <pred:fact_r> <official_website> ; <pred:fact_t> ?pv ] <language_of_work_or_name> ?qpv . ?qpv <pred:value> "English" .   }
Program:
function: FindAll
function: FilterStr
dependencies: 0
inputs: official website
http://www.hbo.com
function: QFilterStr
dependencies: 1
inputs: language of work or name
English
function: FilterConcept
dependencies: 2
inputs: film production company
function: Relate
dependencies: 3
inputs: parent organization
backward
function: FilterConcept
dependencies: 4
inputs: film production company
function: What
dependencies: 5
Answer: HBO Films