Question: What is the Amazon author page of the person who wrote The Firm (the one whose publication date is 1991)?
Choices: B000APUABO
B000AP81EC
B000AP7JOU
B000AQ40M8
B000APYT8O
B002ZFZSUA
B000APVBKI
B000APWRRY
B000APVLWQ
B00BRTKOEA
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "human" . ?e_1 <author> ?e . ?e_1 <pred:name> "The Firm" . ?e_1 <publication_date> ?pv_1 . ?pv_1 <pred:year> 1991 . ?e <Amazon_author_page> ?pv .  }
Program:
function: Find
inputs: The Firm
function: FilterYear
dependencies: 0
inputs: publication date
1991
=
function: Relate
dependencies: 1
inputs: author
forward
function: FilterConcept
dependencies: 2
inputs: human
function: QueryAttr
dependencies: 3
inputs: Amazon author page
Answer: B000AQ40M8