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The word "dollar" is one of the words in the first paragraph of Section 9 of Article 1 of the U.S. Constitution. In that context, "dollars" is a reference to the Spanish milled dollar, a coin that had a monetary value of 8 Spanish units of currency, or reales. In 1792 the U.S. Congress adopted legislation titled An act establishing a mint, and regulating the Coins of the United States. Section 9 of that act authorized the production of various coins, including "DOLLARS OR UNITS—each to be of the value of a Spanish milled dollar as the same is now current, and to contain three hundred and seventy-one grains and four sixteenth parts of a grain of pure, or four hundred and sixteen grains of standard silver". Section 20 of the act provided, "That the money of account of the United States shall be expressed in dollars, or units... and that all accounts in the public offices and all proceedings in the courts of the United States shall be kept and had in conformity to this regulation". In other words, this act designated the United States dollar as the unit of currency of the United States.
How many grains of pure silver were meant to be in a single milled dollar?
A: unanswerable

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In theory, the stadtholders were freely appointed by and subordinate to the states of each province. However, in practice the princes of Orange of the House of Orange-Nassau, beginning with William the Silent, were always chosen as stadtholders of most of the provinces. Zeeland and usually Utrecht had the same stadtholder as Holland.
Who appointed the stadtholders?
A: the states of each province

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Beyoncé names Michael Jackson as her major musical influence. Aged five, Beyoncé attended her first ever concert where Jackson performed and she claims to have realised her purpose. When she presented him with a tribute award at the World Music Awards in 2006, Beyoncé said, "if it wasn't for Michael Jackson, I would never ever have performed." She admires Diana Ross as an "all-around entertainer" and Whitney Houston, who she said "inspired me to get up there and do what she did." She credits Mariah Carey's singing and her song "Vision of Love" as influencing her to begin practicing vocal runs as a child. Her other musical influences include Aaliyah, Prince, Lauryn Hill, Sade Adu, Donna Summer, Mary J. Blige, Janet Jackson, Anita Baker and Rachelle Ferrell.
What song by Mariah Carey influenced her?
A: Vision of Love

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In May 2005, the first high definition video conferencing systems, produced by LifeSize Communications, were displayed at the Interop trade show in Las Vegas, Nevada, able to provide video at 30 frames per second with a 1280 by 720 display resolution. Polycom introduced its first high definition video conferencing system to the market in 2006. As of the 2010s, high definition resolution for videoconferencing became a popular feature, with most major suppliers in the videoconferencing market offering it.
What did LifeSize Communications introduce in 2006?
A:
unanswerable