Did {Mars} {geography of topic} {geography of Mars}?
What is the geography of Mars?
What is the geography of the planet, Mars?
ASK WHERE { resource:Mars property:geography_of_topic resource:geography_of_Mars }
 ASK { ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q111> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P2633> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q128621>. } 
ASK WHERE { wd:Q111 wdt:P2633 wd:Q128621 }