Assertion: drop | /r/HasProperty | claimed
Facets:
Source sentences:
text: However, it has been claimed that they were invented in the Netherlands (although it has been suggested that they had been known about by glassmakers since the time of the Roman Empire), hence common names for them in the 17th century were lacrymae Borussicae (Prussian tears) or lacrymae Batavicae (Dutch tears).