Question: How do you call someone who is practicing veganism ?
Paraphrase: How do you call somebody who is practicing veganism ?
SPARQL (Wikidata):  select distinct ?sbj where { ?sbj wdt:P135 wd:Q181138 . ?sbj wdt:P31 wd:Q5 } 
Answer: Donald Watson, George Monbiot, Luis Vallejo Rodríguez, Gary Yourofsky, Luísa Mell, Vegan Black Metal Chef, Jamie-Lee Kriewitz, Jabari Brisport, Simon Springer, Khaled bin Alwaleed bin Talal, Ed Winters, Richard J. White, Renate Brucker