Question: Which taxon is the main subject of the written work whose ISBN-13 is 978-0-394-58816-2?
Choices: Capsicum
Allium cepa
Micropterus salmoides
dinosaur
virus
Persea americana
Northern Dancer
Pyrus
white cabbage
broccoli
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "taxon" . ?e_1 <main_subject> ?e . ?e_1 <pred:instance_of> ?c_1 . ?c_1 <pred:name> "written work" . ?e_1 <ISBN-13> ?pv . ?pv <pred:value> "978-0-394-58816-2" .   }
Program:
function: FindAll
function: FilterStr
dependencies: 0
inputs: ISBN-13
978-0-394-58816-2
function: FilterConcept
dependencies: 1
inputs: written work
function: Relate
dependencies: 2
inputs: main subject
forward
function: FilterConcept
dependencies: 3
inputs: taxon
function: What
dependencies: 4
Answer: dinosaur