Problem: Compact disc:

This method produces the clear plastic blank part of the disc. After a metallic reflecting layer (usually aluminium, but sometimes gold or other metal) is applied to the clear blank substrate, the disc goes under a UV light for curing and it is ready to go to press. To prepare to press a CD, a glass master is made, using a high-powered laser on a device similar to a CD writer. The glass master is a positive image of the desired CD surface (with the desired microscopic pits and lands). After testing, it is used to make a die by pressing it against a metal disc.

How are the pits and lands made?
---
A: unanswerable


Problem: San Diego:

With the automobile being the primary means of transportation for over 80 percent of its residents, San Diego is served by a network of freeways and highways. This includes Interstate 5, which runs south to Tijuana and north to Los Angeles; Interstate 8, which runs east to Imperial County and the Arizona Sun Corridor; Interstate 15, which runs northeast through the Inland Empire to Las Vegas and Salt Lake City; and Interstate 805, which splits from I-5 near the Mexican border and rejoins I-5 at Sorrento Valley.

Where does Interstate 805 split from I-6?
---
A: unanswerable


Problem: American Idol:

There were 13 finalists this season, but two were eliminated in the first result show of the finals. A new feature introduced was the "Judges' Save", and Matt Giraud was saved from elimination at the top seven by the judges when he received the fewest votes. The next week, Lil Rounds and Anoop Desai were eliminated.

How many finalists were eliminated during the first results show?
---
A: two


Problem: Cubism:

This technique of representing simultaneity, multiple viewpoints (or relative motion) is pushed to a high degree of complexity in Gleizes' monumental Le Dépiquage des Moissons (Harvest Threshing), exhibited at the 1912 Salon de la Section d'Or, Le Fauconnier’s Abundance shown at the Indépendants of 1911, and Delaunay's City of Paris, shown at the Indépendants in 1912. These ambitious works are some of the largest paintings in the history of Cubism. Léger’s The Wedding, also shown at the Salon des Indépendants in 1912, gave form to the notion of simultaneity by presenting different motifs as occurring within a single temporal frame, where responses to the past and present interpenetrate with collective force. The conjunction of such subject matter with simultaneity aligns Salon Cubism with early Futurist paintings by Umberto Boccioni, Gino Severini and Carlo Carrà; themselves made in response to early Cubism.

Which of Gliezes pieces was featured at Salon de la Section d'Or? 
---
A:
Le Dépiquage des Moissons (Harvest Threshing)