TASK DEFINITION: This task is about writing a correct answer for the reading comprehension task. Based on the information provided in a given passage, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.
PROBLEM: Passage: The softness of copper partly explains its high electrical conductivity (59.6×106 S/m) and thus also high thermal conductivity, which are the second highest (to silver) among pure metals at room temperature. This is because the resistivity to electron transport in metals at room temperature mostly originates from scattering of electrons on thermal vibrations of the lattice, which are relatively weak for a soft metal. The maximum permissible current density of copper in open air is approximately 3.1×106 A/m2 of cross-sectional area, above which it begins to heat excessively. As with other metals, if copper is placed against another metal, galvanic corrosion will occur. Question: What is the explanation for copper's capacity for electrical conductivity?

SOLUTION: The softness

PROBLEM: Passage: In the 16th century, Count Hieronymus Schlick of Bohemia began minting coins known as Joachimstalers (from German thal, or nowadays usually Tal, "valley", cognate with "dale" in English), named for Joachimstal, the valley where the silver was mined (St. Joachim's Valley, now Jáchymov; then part of the Kingdom of Bohemia, now part of the Czech Republic). Joachimstaler was later shortened to the German Taler, a word that eventually found its way into Danish and Swedish as daler, Norwegian as dalar and daler, Dutch as daler or daalder, Ethiopian as ታላሪ (talari), Hungarian as tallér, Italian as tallero, and English as dollar. Alternatively, thaler is said to come from the German coin Guldengroschen ("great guilder", being of silver but equal in value to a gold guilder), minted from the silver from Joachimsthal. Question: Other than "taler", what is the other name of the German coin?

SOLUTION: Guldengroschen

PROBLEM: Passage: The Greece women's national water polo team have emerged as one of the leading powers in the world, becoming World Champions after their gold medal win against the hosts China at the 2011 World Championship. They have also won the silver medal at the 2004 Summer Olympics, the gold medal at the 2005 World League and the silver medals at the 2010 and 2012 European Championships. The Greece men's national water polo team became the third best water polo team in the world in 2005, after their win against Croatia in the bronze medal game at the 2005 World Aquatics Championships in Canada. The domestic top water polo leagues, Greek Men's Water Polo League and Greek Women's Water Polo League are considered amongst the top national leagues in European water polo, as its clubs have made significant success in European competitions. In men's European competitions, Olympiacos has won the Champions League, the European Super Cup and the Triple Crown in 2002 becoming the first club in Water polo history to win every title in which it has competed within a single year (National championship, National cup, Champions League and European Super Cup), while NC Vouliagmeni has won the LEN Cup Winners' Cup in 1997. In women's European competitions, Greek water polo teams (NC Vouliagmeni, Glyfada NSC, Olympiacos, Ethnikos Piraeus) are amongst the most successful in European water polο, having won as many as 4 LEN Champions Cups, 3 LEN Trophies and 2 European Supercups. Question: In what year did Greece's women's water polo team win the World Championship?

SOLUTION:
2011