Question: who profession for field of this occupation of rugby union?
Paraphrase: Who would seek to enter the sport profession of the rugby union?
SPARQL (Wikidata):  select distinct ?sbj where { ?sbj wdt:P425 wd:Q5849 . ?sbj wdt:P31 wd:Q28640 } 
Answer: rugby union player, rugby union coach, rugby union executive