Question: Who was the mayor of New York during the time when the US had its highest unemployment rate?

Knowledge 1: Tanzania
The output of goods and services produced by labor and property located in the United States—decreased at an annual rate of approximately 6% in the fourth quarter of 2008 and first quarter of 2009, versus activity in the year-ago periods. The U.S. unemployment rate increased to 10.1% by October 2009, the highest rate since 1983 and roughly twice the pre-crisis rate. The average hours per work week declined to 33, the lowest level since the government began collecting the data in 1964. With the decline of gross domestic product came the decline in innovation. With fewer resources to risk in creative destruction, the number of patent applications flat-lined. Compared to the previous 5 years of exponential increases in patent application, this stagnation correlates to the similar drop in GDP during the same time period. [SEP] Knowledge 2: New York City
New York became the most populous urbanized area in the world in the early 1920s, overtaking London. The metropolitan area surpassed the 10 million mark in the early 1930s, becoming the first megacity in human history. The difficult years of the Great Depression saw the election of reformer Fiorello La Guardia as mayor and the fall of Tammany Hall after eighty years of political dominance.
Knowledge 1: Tanzania
The output of goods and services produced by labor and property located in the United States—decreased at an annual rate of approximately 6% in the fourth quarter of 2008 and first quarter of 2009, versus activity in the year-ago periods. The U.S. unemployment rate increased to 10.1% by October 2009, the highest rate since 1983 and roughly twice the pre-crisis rate. The average hours per work week declined to 33, the lowest level since the government began collecting the data in 1964. With the decline of gross domestic product came the decline in innovation. With fewer resources to risk in creative destruction, the number of patent applications flat-lined. Compared to the previous 5 years of exponential increases in patent application, this stagnation correlates to the similar drop in GDP during the same time period. [SEP] Knowledge 2: Rudy Giuliani during the September 11 attacks
As Mayor of New York City during the September 11 attacks in 2001, Rudy Giuliani played a visible role in the response to the terrorist attack against the World Trade Center towers in New York City. For this he earned great praise at the time.
Knowledge 1: Tanzania
The output of goods and services produced by labor and property located in the United States—decreased at an annual rate of approximately 6% in the fourth quarter of 2008 and first quarter of 2009, versus activity in the year-ago periods. The U.S. unemployment rate increased to 10.1% by October 2009, the highest rate since 1983 and roughly twice the pre-crisis rate. The average hours per work week declined to 33, the lowest level since the government began collecting the data in 1964. With the decline of gross domestic product came the decline in innovation. With fewer resources to risk in creative destruction, the number of patent applications flat-lined. Compared to the previous 5 years of exponential increases in patent application, this stagnation correlates to the similar drop in GDP during the same time period. [SEP] Knowledge 2: New York City
New York City has a high degree of income disparity as indicated by its Gini Coefficient of 0.5 for the city overall and 0.6 for Manhattan. The disparity is driven by wage growth in high-income brackets, while wages have stagnated for middle and lower-income brackets. In the first quarter of 2014, the average weekly wage in New York County (Manhattan) was $2,749, representing the highest total among large counties in the United States. In 2013, New York City had the highest number of billionaires of any city in the world, higher than the next five U.S. cities combined, including former Mayor Michael R. Bloomberg. New York also had the highest density of millionaires per capita among major U.S. cities in 2014, at 4.6% of residents. Lower Manhattan has been experiencing a baby boom, with the area south of Canal Street witnessing 1,086 births in 2010, 12% greater than 2009 and over twice the number born in 2001.

Answer: Fiorello La Guardia