The problem: Answer a question about this article:
On December 12, the Supreme Soviet of the Russian SFSR formally ratified the Belavezha Accords and renounced the 1922 Union Treaty. The Russian deputies were also recalled from the Supreme Soviet of the USSR. The legality of this action was questionable, since Soviet law did not allow a republic to unilaterally recall its deputies. However, no one in either Russia or the Kremlin objected. Any objections from the latter would have likely had no effect, since the Soviet government had effectively been rendered impotent long before December. In effect, the largest and most powerful republic had seceded from the Union. Later that day, Gorbachev hinted for the first time that he was considering stepping down.
When were the Belavezha Accords ratified?
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The answer: December 12


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Likewise, group theory helps predict the changes in physical properties that occur when a material undergoes a phase transition, for example, from a cubic to a tetrahedral crystalline form. An example is ferroelectric materials, where the change from a paraelectric to a ferroelectric state occurs at the Curie temperature and is related to a change from the high-symmetry paraelectric state to the lower symmetry ferroelectic state, accompanied by a so-called soft phonon mode, a vibrational lattice mode that goes to zero frequency at the transition.
What stage of a physical transformation can group theory be used to make prediction?
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The answer: phase transition


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The craft has also been popular in early medieval Rus, inherited as part of the Byzantine tradition. Yaroslav, the Grand Prince of the Kievan Rus' built a large cathedral in his capital, Kiev. The model of the church was the Hagia Sophia in Constantinople, and it was also called Saint Sophia Cathedral. It was built mainly by Byzantine master craftsmen, sent by Constantine Monomachos, between 1037 and 1046. Naturally the more important surfaces in the interior were decorated with golden mosaics. In the dome we can see the traditional stern Pantokrator supported by angels. Between the 12 windows of the drum were apostles and the four evangelists on the pendentives. The apse is dominated by an orant Theotokos with a Deesis in three medallions above. Below is a Communion of the Apostles.
What was used as a model for the church Yaroslav commissioned?
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The answer: the Hagia Sophia


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In 1970, President Nasser died and was succeeded by Anwar Sadat. Sadat switched Egypt's Cold War allegiance from the Soviet Union to the United States, expelling Soviet advisors in 1972. He launched the Infitah economic reform policy, while clamping down on religious and secular opposition. In 1973, Egypt, along with Syria, launched the October War, a surprise attack to regain part of the Sinai territory Israel had captured 6 years earlier. it presented Sadat with a victory that allowed him to regain the Sinai later in return for peace with Israel.
What did Sadat exchange for the remainder of Sinai?
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The answer:
peace with Israel