Question: Stephen Williams is head coach of which Lutheran school located in Adelaide, South Australia?

Context paragraphs:
Stephen Williams (footballer): Stephen Williams (born 5 June 1961) is a former Australian rules footballer in the South Australian National Football League, playing for the Port Adelaide Magpies and is currently an assistant development coach at Port Adelaide Power and head coach of the Immanuel College first XVIII.

Paso Robles High School: Paso Robles High School (PRHS) is the only comprehensive high school located in the city of Paso Robles, California.  The school receives its students from George H. Flamson Middle School and Daniel E. Lewis Middle School, both located in Paso Robles, as well as from the Lillian Larsen School, a public K-8 school in San Miguel, California and Pleasant Valley Elementary School, a public K-8 school located in an outlying area of northeastern San Luis Obispo County.  Additionally, the school receives students from private K-8 schools such as Trinity Lutheran School and St. Rose Catholic School, both located in Paso Robles.

Lutheran High School of Hawaii: Lutheran High School of Hawaii (LHSH) was a Lutheran High School located on the grounds of Our Redeemer Lutheran Church at 1404 University Avenue in Honolulu on Oahu, Hawaii.  LHSH was accredited by the Western Association of Schools and Colleges (WASC), the Hawaii Association of Independent Schools (HAIS), and National Lutheran School Accreditation (NLSA), and was a member of the Interscholastic League of Honolulu (ILH) and PAC-5 sports programs.

Immanuel College (Australia): Immanuel College, is a Lutheran school in Adelaide, South Australia.  It is the only Lutheran college in Adelaide that has boarders.  Its sister schools include Concordia College in Adelaide, Johann-Sebastian-Bach-Gymnasium in Windsbach, Germany and Kyushu Lutheran College in Kumamoto, Japan.

Lutheran South Academy: Lutheran South Academy is a private pre-kindergarten through 12th grade Lutheran school located in Houston, Texas, United States.  The school is a member of the Houston Area Independent Schools, a group of roughly 50 private, parochial and independent institutions in the Greater Houston area.

Coonalpyn Lutheran Church: Coonalpyn Lutheran Church (also called Coonalpyn Redeemer Lutheran Church) is a Lutheran church in the Australian state of South Australia located in Coonalpyn.  It is reported as being the largest church in the Coonalpyn Lutheran Parish which has congregations in Tintinara and Meningie.  Built in the 1950s, it was the first Lutheran church in Australia to have both "Evangelical Lutheran Church in Australia" (ELCA) and "United Evangelical Lutheran Church of Australia" (UELCA) congregations worship in the same building before the two Synods amalgamated in 1966.

Evergreen Lutheran High School: Evergreen Lutheran High School (commonly shortened to "Evergreen") is a private secondary school owned and operated by the Pacific Northwest Lutheran High School Association.  It is affiliated with the Wisconsin Evangelical Lutheran Synod and Evangelical Lutheran Synod (WELS and ELS), and is located in Tacoma, Washington.  Evergreen Lutheran High School is supported by The Evergreen Lutheran School System (TELSS) which comprises Evangelical Lutheran Synod (ELS) and Wisconsin Evangelical Lutheran Synod (WELS) churches and primary schools in the Puget Sound and Pacific Northwest area.  The school is "committed to offering a quality, Christ-centered education which prepares God's children to serve him now and forever."  The school's mascot is the Eagle, and the sports teams are referred to as the Evergreen Eagles.  The school is traditionally attended by teen members of area WELS churches, as well as a large number of international students from South Korea, China, Hong Kong, India, and Japan.

Faith Lutheran Middle School &amp; High School: Faith Lutheran Middle School & High School is a private Christian school located in Summerlin, Clark County, Nevada serving the Las Vegas Valley.  Faith has students who come from 60 different zip codes.  The school, which began in 1979, serves grades 6–12 and is affiliated with the Lutheran Church–Missouri Synod.  Faith Lutheran is the largest Lutheran school in the United States and the largest non-public school in the state of Nevada.  Faith Lutheran is governed by a Board of Directors representing the thirteen Lutheran churches in its association.

Lutheran High School South: Lutheran High School South (LHSS) is a co-educational, private, Lutheran school located in Affton, an unincorporated area in St. Louis County, Missouri.

Concordia College (South Australia): Concordia College is an independent and co-educational Lutheran school located in Adelaide, South Australia.  Established in 1890, Concordia caters for around 1300 students from ELC to Year 12.  The school has been an International Baccalaureate (IB) World School since January 2001 and offers the IB Primary Years, Middle Years and Diploma Programmes.  "Concordia" is a Latin word meaning "harmony".

Supporting paragraphs: Stephen Williams (footballer) Immanuel College (Australia)
Answer: Immanuel College