What is {instance of} of {platinum} that is {followed by} is {gold} ?
When is {occurrence of} of {platinum} which is {taken after by} is {gold} ?
When is {instance of} of {platinum} which is {followed by} is {gold} ?
SELECT ?z WHERE { ?f property:followed_by resource:gold . resource:platinum rdf:type ?f . ?f rdf:type ?z }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q880> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P31> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P156> <http://wikidata.dbpedia.org/resource/Q897>
} 

SELECT ?obj WHERE { wd:Q880 p:P31 ?s . ?s ps:P31 ?obj . ?s pq:P156 wd:Q897 }