The 1917 Penn Quakers football team represented the University of Pennsylvania in the 1917 college football season.
 The Quakers finished with a 9–2 record in their second year under head coach Bob Folwell.
 Significant games included victories over Michigan (16–0), Carlisle (26–0), and Cornell (37–0), and losses to undefeated national champion Georgia Tech (0–41) and Pittsburgh (6–14).
 The 1917 Penn team outscored its opponents by a combined total of 245 to 71.
The 1920 Navy Midshipmen football team represented the United States Naval Academy during the 1920 college football season.
 In their first season under head coach Bob Folwell, the Midshipmen compiled a 6–2 record, shut out three opponents, and outscored all opponents by a combined score of 164 to 43.
The 1923 Navy Midshipmen football team represented the United States Naval Academy during the 1923 college football season.
 In their fourth season under head coach Bob Folwell, the Midshipmen compiled a 5–1–3 record, shut out three opponents, and outscored all opponents by a combined score of 168 to 62.
The 1924 Navy Midshipmen football team represented the United States Naval Academy during the 1924 college football season.
 In their fifth season under head coach Bob Folwell, the Midshipmen compiled a 2–6 record and outscored opponents by a combined score of 91 to 79.
The United States Naval Academy (also known as USNA, Annapolis, or simply Navy) is a four-year coeducational federal service academy in Annapolis, Maryland.
 Established on 10 October 1845, under Secretary of the Navy George Bancroft, it is the second oldest of the United States' five service academies, and educates officers for commissioning primarily into the United States Navy and United States Marine Corps.
 The 338 acre campus is located on the former grounds of Fort Severn at the confluence of the Severn River and Chesapeake Bay in Anne Arundel County, 33 mi east of Washington, D.C. and 26 mi southeast of Baltimore.
 The entire campus is a National Historic Landmark and home to many historic sites, buildings, and monuments.
 It replaced Philadelphia Naval Asylum, in Philadelphia, that served as the first United States Naval Academy from 1838 to 1845 when the Naval Academy formed in Annapolis.
The 1922 Navy Midshipmen football team represented the United States Naval Academy during the 1922 college football season.
 In their third season under head coach Bob Folwell, the Midshipmen compiled a 5–2 record, shut out four opponents, and outscored all opponents by a combined score of 185 to 37.
The 1909 Lafayette football team represented Lafayette College in the 1909 college football season.
 Lafayette shut out seven of its eight opponents and finished with a 7–0–1 record in their first year under head coach Bob Folwell.
 Significant games included victories over Princeton (6–0) and Lehigh (21–0).
 The only blemish on the team's record was a 6–6 tie with Penn.
 The 1909 Lafayette team outscored its opponents by a combined total of 176 to 6.
 Lafayette fullback George McCaa received recognition on the 1909 College Football All-America Team, as a third-team selection by Walter Camp and a second-team selection by "The New York Times".
The 1921 Navy Midshipmen football team represented the United States Naval Academy during the 1921 college football season.
 In their second season under head coach Bob Folwell, the Midshipmen compiled a 6–1 record, shut out six opponents, and outscored all opponents by a combined score of 147 to 13.
USNA Out is an American non-profit organization of lesbian, gay, bisexual and transgender (LGBT) Alumni of the U. S. Naval Academy in Annapolis, Maryland.
 USNA Out is an independent 501(c)(3) organization that does not represent the Naval Academy Alumni Association nor the U. S. Naval Academy.
 USNA Out is the first LGBT organization representing alumni from a federal service academy.
Robert Cook "Bob" Folwell, Jr. (February 17, 1885 – January 8, 1928) was an American football player and coach.
 He served as the head coach at Lafayette College (1909–1911), Washington & Jefferson College (1912–1915), the University of Pennsylvania (1916–1919), and the United States Naval Academy (1920–1924), compiling a career college football record of 106–29–9.
 Folwell then moved to the professional ranks, coaching the National Football League's New York Giants (1925), the Philadelphia Quakers of the American Football League (1926), and the Atlantic City Roses of the Eastern League of Professional Football (1927).

Question: Bob Folwell was the head coach at the federal service academy in what Maryland city?
Answer: Annapolis