What is <decay mode> of <alpha decay> ?
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Which is the decay mode for alpha decay?
SELECT DISTINCT ?b WHERE { ?b property:decay_mode resource:alpha_decay }
select distinct ?answer where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject>  ?answer. ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P817> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q179856>. }
select distinct ?answer where { ?answer wdt:P817 wd:Q179856}
uranium-238 plutonium-240