Context and question: Having been capital of a vast pre-Hispanic empire, and also the capital of richest viceroyalty within the Spanish Empire (ruling over a vast territory in the Americas and Spanish West Indies), and, finally, the capital of the United Mexican States, Mexico City has a rich history of artistic expression. Since the mesoamerican pre-Classical period the inhabitants of the settlements around Lake Texcoco produced many works of art and complex craftsmanship, some of which are today displayed at the world-renowned National Museum of Anthropology and the Templo Mayor museum. While many pieces of pottery and stone-engraving have survived, the great majority of the Amerindian iconography was destroyed during the Conquest of Mexico.
When did Mexico City lost most of its artifacts? 
Answer: Conquest of Mexico
Context and question: Traditional architecture is distinctive and include the Manueline, also known as Portuguese late Gothic, a sumptuous, composite Portuguese style of architectural ornamentation of the first decades of the 16th century. A 20th-century interpretation of traditional architecture, Soft Portuguese style, appears extensively in major cities, especially Lisbon. Modern Portugal has given the world renowned architects like Eduardo Souto de Moura, Álvaro Siza Vieira (both Pritzker Prize winners) and Gonçalo Byrne. In Portugal Tomás Taveira is also noteworthy, particularly for stadium design.
What is the Manueline style also known as?
Answer: Portuguese late Gothic
Context and question: Alloys are often made to alter the mechanical properties of the base metal, to induce hardness, toughness, ductility, or other desired properties. Most metals and alloys can be work hardened by creating defects in their crystal structure. These defects are created during plastic deformation, such as hammering or bending, and are permanent unless the metal is recrystallized. However, some alloys can also have their properties altered by heat treatment. Nearly all metals can be softened by annealing, which recrystallizes the alloy and repairs the defects, but not as many can be hardened by controlled heating and cooling. Many alloys of aluminium, copper, magnesium, titanium, and nickel can be strengthened to some degree by some method of heat treatment, but few respond to this to the same degree that steel does.
|Creating defects in what softens a metal?
Answer:
unanswerable