"This specifies the gr:ProductOrService that the gr:TypeAndQuantityNode is referring to."@en . . _:vb15877 _:vb15879 . . _:vb15877 . "type of good (1..1)"@en . _:vb15879 . _:vb15877 . . _:vb15879 _:vb15878 . _:vb15878 . _:vb15878 .