In 1910, Chicago was the second largest city in the country, Philadelphia was the third largest, St. Louis was the fourth largest, Boston was the fifth largest, Houston was the 68th largest, and the unlabeled city was the 17th largest city in the country. In 2010, Chicago was the third largest city in the country, Philadelphia was the fifth largest, St, Louis was the 58th largest, Boston was the 21st largest, Houston was the 4th largest city, and the unlabeled city was the 2nd largest city in the country. What is the unlabeled city represented in the graph?