input question: Extract the answer to the question from the following context. Question: Losing what physical property would render a LaserDisc unable to be played? Context: Many early LDs were not manufactured properly; sometimes a substandard adhesive was used to sandwich together the two sides of the disc.[citation needed] The adhesive contained impurities that were able to penetrate the lacquer seal layer and chemically attack the metalized reflective aluminium layer, causing it to oxidize and lose its reflective characteristics. This was a problem that was termed "laser rot" among LD enthusiasts, also called "color flash" internally by LaserDisc-pressing plants. Some forms of laser rot could appear as black spots that looked like mold or burned plastic which cause the disc to skip and the movie to exhibit excessive speckling noise. But, for the most part, rotted discs could actually appear perfectly fine to the naked eye.???
output answer: its reflective characteristics

input question: Extract the answer to the question from the following context. Question: What did West help Foxy with? Context: West spent much of the late-1990s producing records for a number of well-known artists and music groups. The third song on Foxy Brown's second studio album Chyna Doll was produced by West. Her second effort subsequently became the very first hip-hop album by a female rapper to debut at the top of the U.S. Billboard 200 chart in its first week of release. West produced three of the tracks on Harlem World's first and only album The Movement alongside Jermaine Dupri and the production duo Trackmasters. His songs featured rappers Nas, Drag-On, and R&B singer Carl Thomas. The ninth track from World Party, the last Goodie Mob album to feature the rap group's four founding members prior to their break-up, was co-produced by West with his manager Deric "D-Dot" Angelettie. At the close of the millennium, West ended up producing six songs for Tell 'Em Why U Madd, an album that was released by D-Dot under the alias of The Madd Rapper; a fictional character he created for a skit on The Notorious B.I.G.'s second and final studio album Life After Death. West's songs featured guest appearances from rappers such as Ma$e, Raekwon, and Eminem.???
output answer: very first hip-hop album by a female rapper to debut at the top of the U.S. Billboard 200 chart in its first week of release

input question: Extract the answer to the question from the following context. Question: How did Eisenhower avoid paying the personal tax rate? Context: In 1948, Eisenhower became President of Columbia University, an Ivy League university in New York City. The assignment was described as not being a good fit in either direction. During that year Eisenhower's memoir, Crusade in Europe, was published. Critics regarded it as one of the finest U.S. military memoirs, and it was a major financial success as well. Eisenhower's profit on the book was substantially aided by an unprecedented ruling by the U.S. Department of the Treasury that Eisenhower was not a professional writer, but rather, marketing the lifetime asset of his experiences, and thus he only had to pay capital gains tax on his $635,000 advance instead of the much higher personal tax rate. This ruling saved Eisenhower about $400,000.???
output answer: ruling by the U.S. Department of the Treasury

input question: Extract the answer to the question from the following context. Question: Who wrote about time? Context: The earliest recorded Western philosophy of time was expounded by the ancient Egyptian thinker Ptahhotep (c. 2650–2600 BC), who said, "Do not lessen the time of following desire, for the wasting of time is an abomination to the spirit." The Vedas, the earliest texts on Indian philosophy and Hindu philosophy, dating back to the late 2nd millennium BC, describe ancient Hindu cosmology, in which the universe goes through repeated cycles of creation, destruction, and rebirth, with each cycle lasting 4,320,000 years. Ancient Greek philosophers, including Parmenides and Heraclitus, wrote essays on the nature of time.???
output answer:
Parmenides and Heraclitus