What is {number of protons} of {decays to} of {potassium-40} ?
What is the number of protons of the rots to of potassium-40?
What is the number of protons of the decays to of potassium-40?
SELECT ?h WHERE { ?l property:atomic_number ?h . resource:potassium-40 property:decays_to ?l }
SELECT ?answer WHERE { ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q2251076> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P816>. ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?X . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?X. ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1086> . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?answer . }
SELECT ?answer WHERE { wd:Q2251076 wdt:P816 ?X . ?X wdt:P1086 ?answer}
18 20