Context: The use of uranium in its natural oxide form dates back to at least the year 79 CE, when it was used to add a yellow color to ceramic glazes. Yellow glass with 1% uranium oxide was found in a Roman villa on Cape Posillipo in the Bay of Naples, Italy, by R. T. Gunther of the University of Oxford in 1912. Starting in the late Middle Ages, pitchblende was extracted from the Habsburg silver mines in Joachimsthal, Bohemia (now Jáchymov in the Czech Republic), and was used as a coloring agent in the local glassmaking industry. In the early 19th century, the world's only known sources of uranium ore were these mines.

Question: What was the earliest year in recorded history that uranium oxide was used?
Answer: 79 CE

Question: What color of ceramic glaze was extracted from uranium oxide?
Answer: yellow

Question: In what county was glass with uranium oxide content found?
Answer: Italy

Question: In what year was yellow uranium oxide glass discovered?
Answer: 1912

Question: What institution did R.T. Gunther belong to?
Answer: the University of Oxford

Question: What was the latest year in recorded history that uranium oxide was used?
Answer: Unanswerable

Question: What color of ceramic glaze was subtracted from uranium oxide?
Answer: Unanswerable

Question: In what county was glass with uranium dioxide content found?
Answer: Unanswerable

Question: In what year was yellow uranium oxide glass undiscovered?
Answer: Unanswerable

Question: What institution did T.T. Gunther belong to?
Answer: Unanswerable