Problem: Montevideo:

The first telephone lines were installed in 1882 and electric street lights took the place of the gas operated ones in 1886. The Hipodromo de Maronas started operating in 1888, and the neighbourhoods of Reus del Sur, Reus del Norte and Conciliacion were inaugurated in 1889. The new building of the School of Arts and Trades, as well as Zabala Square in Ciudad Vieja were inaugurated in 1890, followed by the Italian Hospital in 1891. In the same year, the village of Penarol was founded. Other neighbourhoods that were founded were Belgrano and Belvedere in 1892, Jacinto Vera in 1895 and Trouville in 1897. In 1894 the new port was constructed, and in 1897, the Central Railway Station of Montevideo was inaugurated.

When was the Central Railway Station of Montevideo inaugurated?
---
A: 1897

Problem: YouTube:

In February 2015, YouTube announced the launch of a new app specifically for use by children visiting the site, called YouTube Kids. It allows parental controls and restrictions on who can upload content, and is available for both Android and iOS devices. Later on August 26, 2015, YouTube Gaming was launched, a platform for video gaming enthusiasts intended to compete with Twitch.tv. 2015 also saw the announcement of a premium YouTube service titled YouTube Red, which provides users with both ad-free content as well as the ability to download videos among other features.

What was launched on February 26, 2015?
---
A: unanswerable

Problem: LaserDisc:

At least where the digital audio tracks were concerned, the sound quality was unsurpassed at the time compared to consumer videotape, but the quality of the analog soundtracks varied greatly depending on the disc and, sometimes, the player. Many early and lower-end LD players had poor analog audio components, and many early discs had poorly mastered analog audio tracks, making digital soundtracks in any form most desirable to serious enthusiasts. Early DiscoVision and LaserDisc titles lacked the digital audio option, but many of those movies received digital sound in later re-issues by Universal, and the quality of analog audio tracks generally got far better as time went on. Many discs that had originally carried old analog stereo tracks received new Dolby Stereo and Dolby Surround tracks instead, often in addition to digital tracks, helping boost sound quality. Later analog discs also applied CX Noise Reduction, which improved the signal-noise ratio of their audio.

Was analog or digital formatting more popular with enthusiasts?
---
A: digital

Problem: 51st state:

Several websites assert that Israel is the 51st state due to the annual funding and defense support it receives from the United States. An example of this concept can be found in 2003 when Martine Rothblatt published a book called Two Stars for Peace that argued for the addition of Israel and the Palestinian territories surrounding it as the 51st state in the Union. The American State of Canaan, is a book published by Prof. Alfred de Grazia, political science and sociologist, in March 2009, proposing the creation of the 51st and 52nd states from Israel and the Palestinian territories.

Who wrote the book Martine Rothblatt?
---
A:
unanswerable