Context: An error sometimes made is the confusion of discussion regarding Greece’s Eurozone entry with the controversy regarding usage of derivatives’ deals with U.S. Banks by Greece and other Eurozone countries to artificially reduce their reported budget deficits. A currency swap arranged with Goldman Sachs allowed Greece to "hide" 2.8 billion Euros of debt, however, this affected deficit values after 2001 (when Greece had already been admitted into the Eurozone) and is not related to Greece’s Eurozone entry.

Question: What error is sometimes made by tying Greece's Eurozone entry with?
Answer: controversy regarding usage of derivatives’ deals

Question: What banks did Greece use derivatives' deals with?
Answer: U.S. Banks

Question: What was the result of the deals with the U.S. banks?
Answer: artificially reduce their reported budget deficits

Question: How many Euros was Greece able to "hide" because of an arrangement with Goldman Sachs?
Answer: 2.8 billion

Question: Why aren't the deficit values affected by the currency swap with Goldman Sachs relevant to Greece's Eurozone entry?
Answer: affected deficit values after 2001

Question: What error is never made?
Answer: Unanswerable

Question: What banks did Greece lose derivatives' deals with?
Answer: Unanswerable

Question: What was the result of the rejection with the U.S. banks?
Answer: Unanswerable

Question: Why are the deficit values affected by the currency swap with Goldman Sachs relevant to Greece's Eurozone entry?
Answer: Unanswerable

Question: How many Euros was Greece able to give away because of an arrangement with Goldman Sachs?
Answer: Unanswerable