Question: Charles Libby graduated from a high school located at what address?

full_context: Document 1: Cumberland County Jail: The Cumberland County Jail is located in Portland, Maine, and is the largest jail in the state. The jail, a division of the Cumberland County Sheriff's Office, is a part of Cumberland County government and is wholly operated by the elected Sheriff. In 2002 it became the first jail in the state of Maine to receive national accreditation from the American Correctional Association, at the time putting it among only 4% of adult correctional facilities in the USA to have been so accredited. It has the capacity to accommodate 600 inmates, and employs over 200 staff (including 130 Corrections Officers). Most inmates are serving short sentences or awaiting trial.
Document 2: Stephen Chase: Stephen Henry Chase was an American politician from Maine. Chase, a Democrat from Fryeburg, represented Oxford County in the Maine Senate in 1845 and 1846. Chase was Senate President in 1846 when he resigned. He was replaced as Senate President by David Dunn.
Document 3: Adams High School (Portland, Oregon): John Adams High School was a public high school in Portland, Oregon, United States, managed by Portland Public Schools (PPS). Located at 5700 N.E. 39th Avenue (now Cesar Chavez Blvd.), Portland, Oregon, the school opened in 1969. Its curriculum, based on ES-70 and further developed by students and faculty at Harvard Graduate School of Education, had a unique and sometimes controversial approach to secondary education.
Document 4: Mark Lawrence (politician): Mark W. Lawrence (born June 27, 1958) is an American lawyer and politician from Maine. He was born in Kittery, Maine, the Democrat, Lawrence served in the Maine State Legislature from 1988-2000. He was elected as the President of the 118th Maine Senate in December 1996 and then elected as President of the 119th Maine Senate in December 1998, serving in that capacity until 2000. He challenged Republican incumbent Olympia Snowe in the 2000 U.S. Senate election and lost. He lost in the Democratic primary for the open seat in the 1st congressional district in 2008. He served from 2003-2010 as the York County District Attorney and did not seek re-election in 2010. He returned to private practice in South Berwick, Maine. In November 2016, he was elected to the Maine House of Representatives.
Document 5: Portland High School (Maine): Portland High School is a public high school established in 1821 in Portland, Maine (Cumberland County), which educates grades 9–12. The school is part of the Portland Public Schools district. It is located at 284 Cumberland Avenue in downtown Portland.
Document 6: Charlie Summers: Charles E. "Charlie" Summers, Jr. (born December 26, 1959) is an American politician, businessman, Iraq War veteran and member of the Republican Party from the state of Maine. A member of the Maine Senate from 1991 to 1995, Summers ran for the Republican nomination for Maine's 1st congressional district in 1994, coming second in the primary. He was the nominee for the same seat in 2004 and 2008, losing on each occasion to the Democratic candidate. From 2011 to 2013 served as the Secretary of State of Maine. He was the Republican nominee for the U.S Senate to succeed the retiring Republican Olympia Snowe in the 2012 election, but lost to former Independent Governor Angus King.
Document 7: Deering High School: Deering High School (DHS) is a public high school in Portland, Cumberland County, Maine. The school is part of the Portland Public Schools district.
Document 8: James John High School: James John High School was a public high school in the St. Johns neighborhood of Portland, Oregon. It was opened in 1911 and the first graduating class had four students. It closed in 1921 and its replacement, Roosevelt High School, opened the next year. It was named for the founder of St. Johns, James John.
Document 9: Manly B. Townsend: Manly B. Townsend (1803-1849) was an American politician and lawyer from Maine. Townsend served three single year terms (1844, 1845, 1848) in the Maine Senate. In 1845, he was the Senate President.
Document 10: Messalonskee High School: Messalonskee High School is a public high school located in Oakland, Maine. It serves all high school students in the RSU 18 school unit, which includes Oakland, Sidney, Belgrade, China and Rome. The school was founded in 1969 and currently has slightly more than 900 students enrolled. The campus features a 650-seat performing arts center that was built for the school in 1993. In 2005, the district dedicated the Performing Arts Center to former superintendent J. Duke Albanese. Messalonskee is a member of the Kennebec Valley Athletic Conference.
Document 11: Cumberland County, Maine: Cumberland County is a county located in the state of Maine, in the United States. As of the 2010 census, the population was 281,674, making it the most populous county in Maine. Its county seat is Portland. Cumberland County was founded in 1760 from a portion of York County, Massachusetts and named for William, Duke of Cumberland, a son of King George II.
Document 12: Falmouth High School (Maine): Falmouth High School is a public high school located in the town of Falmouth, Maine. The school serves roughly 720 students in grades 9–12. Located on the Woodville Road Campus, the current Falmouth High School was completed in 2001, and opened for the 2001–2002 school year. Previously the school was shared with Falmouth Middle School, and from 1930 to 1955 was in the Plummer-Motz building located on the corner of Middle and Lunt Roads. Falmouth High School is located near the geographic center of town, and is abutted by Falmouth's Community park. The school's athletic teams are called the Yachtsmen, and the school colors are blue and white with gold as secondary.
Document 13: Charles Harlow: Charles W. Harlow (born May 25, 1942) is an American politician from Maine. Harlow served on the Portland, Maine City Council from 1990 to 1999, including a term as ceremonial mayor from 1992 to 1993. In 2004, Harlow was elected as a Democrat to the Maine House of Representatives from District 116. He served until 2010, when he was replaced by his daughter, Denise Harlow.
Document 14: Charles Libby: Charles Freeman Libby (January 31, 1844 - 1915) was an American politician and lawyer from Maine. Libby, a Republican served as President of the Maine Senate from 1891 to 1892 and later as President of the American Bar Association. Libby was born in Limerick, Maine and his family moved to Portland, Maine a few years later. Libby graduated from Portland High School and Bowdoin College in 1864. He interned with a local law firm and studied at Columbia Law School and was admitted to the bar in 1866. In 1882, he served as Mayor of Portland, Maine and was elected to the Maine Senate in 1889, serving until 1892.
Document 15: Charles P. Pray: Charles P. Pray (born August 15, 1945) is an American politician from Maine. Pray was born in the paper mill town of Millinocket, Maine on August 15, 1945. He grew up in northern Piscataquis County, Maine attending a one-room schoolhouse from 1954-1959. He attended Maine Central Institute, graduating from Stearns High School in his birthplace of Millinocket in 1964. He then attended Ricker College in Houlton. In 1966, he enlisted with the US Air Force and served in Southeast Asia during the Vietnam War. Finishing with the Air Force in 1970, he returned to Maine and enrolled at the University of Maine, from which he graduated in 1973 with a B.A. in political science. In 1974, he was elected to the Maine Senate to represent Piscataquis County and the northern area of Penobscot County, which was the largest legislative district east of the Mississippi River. From 1978-1982, Pray served as Assistant Majority Leader of the Maine Senate. From 1982-1984, Pray served as Majority Leader. In 1984, Pray was elected by his peers as President of the Maine Senate, a position he held until a surprise defeat in 1992. He is one of two individuals to serve four terms but is the only Senate President in Maine history to hold the office for 8 full years.
ground_truth: 284 Cumberland Avenue