Article: Zinc metal is produced using extractive metallurgy. After grinding the ore, froth flotation, which selectively separates minerals from gangue by taking advantage of differences in their hydrophobicity, is used to get an ore concentrate. This concentrate consists of about 50% zinc with the rest being sulfur (32%), iron (13%), and SiO
2 (5%). The composition of this is normally zinc sulfide (80% to 85%), iron sulfide (7.0% to 12%), lead sulfide (3.0% to 5.0%) silica (2.5% to 3.5%), and cadmium sulfide (0.35% to 0.41%).

Question: What is used to produce the metal zinc?
Ans: extractive metallurgy.

Article: Bell's father, grandfather, and brother had all been associated with work on elocution and speech, and both his mother and wife were deaf, profoundly influencing Bell's life's work. His research on hearing and speech further led him to experiment with hearing devices which eventually culminated in Bell being awarded the first U.S. patent for the telephone in 1876.[N 4] Bell considered his most famous invention an intrusion on his real work as a scientist and refused to have a telephone in his study.[N 5]

Question: What were his relatives known for working on?
Ans: elocution and speech

Article: Following the defeat in World War I, influence of German-speaking elites over Central and Eastern Europe was greatly limited. At the treaty of Versailles Germany was substantially reduced in size. Austria-Hungary was split up. Rump-Austria, which to a certain extent corresponded to the German-speaking areas of Austria-Hungary (a complete split into language groups was impossible due to multi-lingual areas and language-exclaves) adopted the name "German-Austria" (German: Deutschosterreich). The name German-Austria was forbidden by the victorious powers of World War I. Volga Germans living in the Soviet Union were interned in gulags or forcibly relocated during the Second World War.

Question: Who was relocated during the second world war from the Soviet Union?
Ans: Volga Germans

Article: During the late Bronze Age the island experienced two waves of Greek settlement. The first wave consisted of Mycenaean Greek traders who started visiting Cyprus around 1400 BC. A major wave of Greek settlement is believed to have taken place following the Bronze Age collapse of Mycenaean Greece from 1100 to 1050 BC, with the island's predominantly Greek character dating from this period. Cyprus occupies an important role in Greek mythology being the birthplace of Aphrodite and Adonis, and home to King Cinyras, Teucer and Pygmalion. Beginning in the 8th century BC Phoenician colonies were founded on the south coast of Cyprus, near present-day Larnaca and Salamis.

Question: During what Age did Cyprus experience two waves of Greek settlement?
Ans:
late Bronze Age