[Q]: Sentence: This meant that the electrical recording characteristics of Western Electric licensees such as Columbia Records and Victor Talking Machine Company in the 1925 era had a higher amplitude in the midrange region. Question: On which recording types were pre-emphasis used most in the 1920s?
++++++++++
[A]: no

[Q]: Sentence: Some scientific studies suggest that ozone depletion may have a dominant role in governing climatic change in Antarctica (and a wider area of the Southern Hemisphere). Question: What does ozone depletion cause in the southern atmosphere?
++++++++++
[A]: no

[Q]: Sentence: Early in the Ordovician the continents Laurentia, Siberia and Baltica were still independent continents (since the break-up of the supercontinent Pannotia earlier), but Baltica began to move toward Laurentia later in the period, causing the Iapetus Ocean to shrink between them. Question: What continent fractured off Gondwana in the direction of Laurentia?
++++++++++
[A]:
no