Table for the 6 triples with object <http://nl.dbpedia.org/resource/Periode_7_element> sorted by label

Subject	Predicate
?:Plutonium	ns4:periode
?:Roentgenium	ns4:periode
?:Rutherfordium	ns4:periode
?:Rutherfordium	ns4:periode
?:Thorium	ns4:periode
?:Thorium	ns4:periode