Question: Which is the television series episode for which Sarah Silverman was a voice actress?
Paraphrase: Which is the tv arrangement scene for which Sarah Silverman was a voice actress?
SPARQL (Wikidata):  select distinct ?sbj where { ?sbj wdt:P725 wd:Q229013 . ?sbj wdt:P31 wd:Q21191270 } 
Answer: Space Pilot 3000