MARSHALL - Melissa Sandquist and Mark Andree announce their engagement. Parents of the couple are David and Elaine Sandquist of Marshall and Michael and Valorie Andree of Tracy. Sandquist is a 2004 graduate of Marshall High School and a 2009 graduate of Winona State University with a degree in elementary education and special education. She is a teacher at Children's Care Hospital in Sioux Falls S.D. Andree is a 2000 graduate of Tracy High School and a 2005 graduate of Southwest Minnesota State University with a bachelor of arts degree. He is employed at Wells Fargo in Sioux Falls, S.D. An Aug. 20, 2011, wedding is planned at Tracy Lutheran Church with a reception at the Ramada Inn in Marshall.