Question: In which year did the high school attended by all members of The Lemon Twigs open ?

Context articles: Niles East High School
Hicksville High School (New York)
Boynton High School
Powdersville High School
The Lemon Twigs
Port Charlotte High School
Del Norte High School (Crescent City, California)
Southwest Prairie Conference
William Howard Taft High School (Chicago)
Waxahachie High School

Niles East High School was a public 4–year school in Skokie, Illinois.
 Operated by Niles Township High Schools District 219, Niles East was first opened in 1938 and closed after the 1979–1980 school year.
 Niles East's sister schools Niles West High School and Niles North High School remain open.
 The school was known as Niles Township High School until Niles West High School opened in 1959.
 The school sports teams were named the Trojans.
 The school's greatest claims to fame are its two Nobel Laureate alumni—perhaps even more notable because the school was open for only 42 years.
 It ranks high among schools around the world on the list "Nobel Prize laureates by secondary school affiliation."
Hicksville High School is an American high school in the town of Hicksville, New York, in Nassau County.
 It is the only high school in the Hicksville Union Free School District.
 It opened in 1953.
Boynton High School is a secondary school located in San Jose, California and is a continuation school for the Campbell Union High School District.
 Between 1990 and 2002 when Boynton High School continuation students attended what was then Blackford High School.
 Blackford had been a traditional high school before 1991 when it was closed.
 After a minor disagreement amongst board members of the Campbell Union High School District, they agreed to rename the continuation high school to Boynton High School, and established a new building on the same lot as Blackford.
 The resources of the Blackford High School campus were being shared, and needed to be renovated in order to lease the campus to another school (the former Blackford High School campus is now occupied by neighboring Harker Middle School.)
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Powdersville High School is a public high school in Powdersville, South Carolina, a suburb of Greenville located in Anderson County.
 Powdersville High School, one of three high schools in Anderson School District One, first opened in August 2011.
 The school started with 265 student in grades 9-10.
 Prior to the opening of Powdersville High School, students who lived in the Powdersville area attended Wren High School.
 However, due to growth in the Powdersville area, Anderson School District 1 voted in 2008 to build a high school for Powdersville.
 In 2013-2014, Powdersville High School enrollment was around 750 students in grades 9-12.
 Now, in 2015-2016 school year, Powdersville has an enrollment of around 840 students attending.
 The school also held its first graduation on May 30, 2014.
 The first ever graduating class to finish all 4 years at PVHS, (class of 2015) had an astonishing 96.2 graduation rate, one of the highest in the state.
The Lemon Twigs are an American pop/rock band from Long Island, New York, United States, fronted by brothers Brian D’Addario and Michael D’Addario.
 Both brothers are vocalists, songwriters and multi-instrumentalists, and are joined by Megan Zeankowski on bass and Danny Ayala on keyboards and backing vocals.
 All of the members of The Lemon Twigs attended Hicksville High School (also the alma mater of rock legend Billy Joel).
Port Charlotte High School (PCHS) is a four-year, comprehensive, public high school located in Port Charlotte, Florida, US.
 The school opened in 1981, graduated its first class in 1984, its mascot is the pirate, and the school motto is "Yes, I am a Pirate."
 It is operated by Charlotte County Public Schools.
 At one time, Port Charlotte High School was the largest high school in Charlotte County, with 2,082 students enrolled in grades Grades 9 through 12.
 Enrollment was traditionally based on students' geographic locations, but is now by choice under the more recently created open enrollment program.
 The school has grown much, and it survived Hurricane Charley.
 The school's main feeders are Murdock Middle School, Port Charlotte Middle School, and Punta Gorda Middle School.
 The school's top athletic rivals are Charlotte High School and Lemon Bay High School.
 The property value of the school is $15,797,719 US.
 PCHS has educated two NFL players and one MLB player who also performed in the 2008 Beijing Olympics.
Del Norte High School or DNHS, located in Crescent City, California, is a public high school educating students from grades 9 through 12.
 It is the only regular public high school in Del Norte County.
 In 2008 DNHS was accredited for six years (through 2014) by the Western Association of Schools and Colleges.
 The principal is Coleen Parker, and the vice principals are Randy Fugate and Robert Hadfield.
 In popular culture, Del Norte High School is the school attended by Laurel Sewell and her friends in the best-selling young adult novel, Wings.
The Southwest Prairie Conference (SPC) is an organization of ten high schools in northern Illinois, representing five communities in that part of the state.
 These high schools are all members of the Illinois High School Association.
 The conference began competing during the 2006-2007 academic year.
 Minooka Community High School, Oswego High School, Oswego East High School, Plainfield Central High School, Plainfield East High School, Plainfield North High School, and Plainfield South High School came from the former Suburban Prairie Conference South division.
 Romeoville High School came from the former South Inter-Conference Association North division.
 Joliet Central and Joliet West high schools joined the conference from the Southwest Suburban Conference at the start of the 2016-2017 school year.
William Howard Taft High School is a public 4–year high school located in the Norwood Park neighborhood on the northwest side of Chicago, Illinois, United States.
 Taft serves communities on the far northwest side, specifically Norwood Park, Edison Park, Jefferson Park, Forest Glen and O'Hare.
 Taft is operated by the Chicago Public Schools district.
 The school is perhaps most famous as the high school attended by Jim Jacobs, the writer of "Grease".
 Jacobs used Taft as an inspiration in writing the musical.
 Taft's NJROTC unit has won a Distinguished Unit award every year since 2001.
 Since 2014, Taft High School has been considered a "wall-to-wall" IB school as part of the International Baccalaureate foundation.
 Taft high school has offered the International Baccalaureate program since 2001.
Waxahachie High School is a public high school in the city of Waxahachie, Texas, USA and classified as a 5A school by the UIL.
 It is a part of the Waxahachie Independent School District located in central Ellis County.
 Waxahachie Ninth Grade Academy, with an additional 709 students, is a nearby branch of the high school attended by all freshman.
 In 2015, the school was rated "Met Standard" by the Texas Education Agency.