Table for the 4 triples with object <http://purl.org/NET/book/vocab#term_toReadPrimaryTopicOf> sorted by label

Subject	Predicate
?:to read primary topic of	?:bookmark
?:to read primary topic of	rdfs:isDefinedBy
?:to read primary topic of	?:bookmark
?:to read primary topic of	rdfs:isDefinedBy