what is the {start time} for {Alan Sugar} has {position held} as {Enterprise Champion} ?
At what time did Alan Sugar hold the position as Enterprise Champion?
When was Alan Sugar held the position as Enterprise Champion?
SELECT ?u WHERE { ?a property:position_held resource:Enterprise_Champion . resource:Alan_Sugar property:position_held ?a . ?a property:start_time ?u }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q336520> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P39> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q5380297> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q336520 p:P39 ?s . ?s ps:P39 wd:Q5380297 . ?s pq:P580 ?value}