Question: What class of instruments is associated with the famous person whose Twitter username is DBtodomundo?
Choices: film score
glockenspiel
maraca
post-punk
new wave
acoustic bass guitar
autoharp
tambourine
bass guitar
vibraphone
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "class of instruments" . ?e <famous_people> ?e_1 . ?e_1 <pred:instance_of> ?c_1 . ?c_1 <pred:name> "human" . ?e_1 <Twitter_username> ?pv . ?pv <pred:value> "DBtodomundo" .   }
Program:
function: FindAll
function: FilterStr
dependencies: 0
inputs: Twitter username
DBtodomundo
function: FilterConcept
dependencies: 1
inputs: human
function: Relate
dependencies: 2
inputs: famous people
backward
function: FilterConcept
dependencies: 3
inputs: class of instruments
function: What
dependencies: 4
Answer: autoharp