Question: What does caffeine physically relates with?
SPARQL (Wikidata): select distinct ?answer where { ?answer wdt:P129 wd:Q60235}
Answer: Adenosine A1 receptor, Ryanodine receptor 2, Inositol 1,4,5-trisphosphate receptor type 1, Adenosine A3 receptor, Adenosine A2a receptor, Adenosine A2b receptor, Ryanodine receptor 1, Ryanodine receptor 3, Adenosine A2b receptor