what is the {start time} for {Arthur Beetson} has {member of sports team} as {Sydney Roosters} ?
When did Arthur Beetson become a member of the sports team the Sydney Roosters?
SELECT ?value WHERE { wd:Q2864988 p:P54 ?s . ?s ps:P54 wd:Q2573367 . ?s pq:P580 ?value}
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q2864988> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P54> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q2573367> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

When did Arthur Beetson join the Sydney Roosters?