Question: What is the energy source of gamma-aminobutyric acid?
Paraphrase: What is the vitality source of gamma-aminobutyric corrosive?
SPARQL (Wikidata): SELECT ?answer WHERE { wd:Q210021 wdt:P703 ?X . ?X wdt:P618 ?answer}
Answer: carbohydrate, vitamin, fat, dietary mineral, dietary fiber, protein