What is the {mother} and the {child} of {Poseidon} ?
Who was Poseidon's mother, and who was his child?
Who was Poseidon mother and child?
SELECT ?r ?e WHERE { resource:Poseidon property:mother ?r . resource:Poseidon property:child ?e }
 SELECT ?ans_1 ?ans_2 WHERE { ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q41127> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P25> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?ans_1. ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q41127> . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P40> . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?ans_2. } 
SELECT ?ans_1 ?ans_2 WHERE { wd:Q41127 wdt:P25 ?ans_1 . wd:Q41127 wdt:P40 ?ans_2 }
Rhea Aeolus Rhea Ergiscus Rhea Eurytus Rhea Parnassus Rhea Azaes Rhea Acesamenus Rhea Eleius Rhea Aethusa Rhea Leuconoe Rhea Onchestus Rhea Lamus Rhea Erginus Rhea Amphimarus Rhea Aeolus and Boeotus Rhea Otus Rhea Actor Rhea Alcippe Rhea Anathamvs Rhea Anthes Rhea Antheus Rhea Hyperes Rhea Lamia Rhea Ampheres Rhea Cycnus Rhea Dictys Rhea Belus Rhea Pelasgus Rhea Periphetes Rhea Achaeus Rhea Elasippus Rhea Evaemon Rhea Arpiátes Rhea Aspledon Rhea Athos Rhea Byzénvs Rhea Cenchrias Rhea Chryses Rhea Cromvs Rhea Dicaevs Rhea Dorus Rhea Dyrrachius Rhea Evsírvs Rhea Oeoclus Rhea Peratos Rhea Nausithous Rhea Triton Rhea Pegasus Rhea Aeolus Rhea Pelias Rhea Bellerophon Rhea Proteus Rhea Charybdis Rhea Polyphemus Rhea Augeias of Elis Rhea Megareus of Onchestus Rhea Procrustes Rhea Antaeus Rhea Abas Rhea Abderus Rhea Chrysaor Rhea Taphius Rhea Glaucus Rhea Agelus Rhea Agenor Rhea Eryx Rhea Syleus Rhea Alebion Rhea Halirrhothius Rhea Belus Rhea Asopus Rhea Neleus Rhea Phineus Rhea Rhodos Rhea Cychreus Rhea Amycus Rhea Busiris Rhea Euphemus Rhea Atlas Rhea Polydectes Rhea Benthesikyme Rhea Nauplius Rhea Arion Rhea Sinis Rhea Cymopoleia Rhea Byzas Rhea Dictys Rhea Ephialtes Rhea Cycnus Rhea Chios Rhea The Ram of the Golden Fleece Rhea Chthonius Rhea Eumolpus Rhea Idas Rhea Despoina Rhea Butes Rhea Hippothoon Rhea Theseus Rhea Epopeus Rhea Cercyon of Eleusis Rhea Evadne Rhea Eurypylus Rhea Minyas Rhea Sciron Rhea Aloeus Rhea Ancaeus Rhea Lelex Rhea Hyrieus Rhea Mestor Rhea Taras Rhea Caanthus Rhea Delphus Rhea Celaenus Rhea Almops Rhea Triopas Rhea Boeotus Rhea Eurypylus Rhea Leucon Rhea Lycus Rhea Nireus Rhea Nycteus Rhea Phocus Rhea Anthas Rhea Aon Rhea Cteatus Rhea Palaestinus Rhea Poltys Rhea Sarpedon Rhea Sikanos Rhea Althepus Rhea Lepreus Rhea Mygdon of Bebryces Rhea Siculus Rhea Sithon Rhea Amyrus Rhea Bergion Rhea Eirene Rhea Phthius Rhea Eumelus Rhea Astacus Rhea Mneseus Rhea Paeon Rhea Phaeax Rhea Taenarus