Did {Serena_Williams} {ethnic group} {list of African-American firsts}?
On the African-American ethnic group list, does Serena Williams come in first?
On the list, is Serena Williams the first African-American ethnic group?
ASK WHERE { resource:Serena_Williams property:ethnic_group resource:list_of_African-American_firsts }
 ASK { ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q11459> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P172> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q6560667>. } 
ASK WHERE { wd:Q11459 wdt:P172 wd:Q6560667 }