Question: Who did Rosemary Siemens collaborate with who was also once a Miss Ohio?

Context paragraphs:
Sarah Hider: Sarah Hider (born June 10, 1991) is an American beauty pageant titleholder from Wooster, Ohio, who was chosen as Miss Ohio's Outstanding Teen 2008 and crowned Miss Ohio 2015.  She competed for the Miss America 2016 title in September 2015.

Audrey Bolte: Audrey Bolte (born in the late 1980s) is an American beauty pageant titleholder from Batavia, Ohio.  She was crowned Miss Ohio USA 2012 and competed in the Miss USA 2012 pageant where she was named second runner-up.  She had never competed in a beauty pageant before becoming Miss Batavia 2012 and then Miss Ohio USA.

Renaissance Theatre (Mansfield, Ohio): The Renaissance Theatre, previously known as the Ohio Theatre, is a restored movie palace-type theater located at 138 Park Ave. W in Mansfield, Ohio.  The 1,402 seat theater opened on January 18, 1928 as the Ohio Theatre and serves today as the largest performing arts center in North-Central Ohio.  The Renaissance Performing Arts Association operates the facility and annually produces and presents approximately 40 productions consisting of Broadway-style musical theater shows, classical music concerts, comedy shows, educational performances and outreach programs, popular music concerts, special events, and family shows.  The Renaissance is also home to the Mansfield Symphony Orchestra and the Miss Ohio Scholarship Pageant, the state competition for the Miss America Pageant.

Miss Ohio USA: The Miss Ohio USA competition is the pageant that selects the representative for the state of Ohio in the Miss USA pageant, and the name of the title held by that winner.  It has previously been known as Miss Ohio Universe.  Two Ohio representatives, Sue Downey in 1965 and Kim Seelbrede in 1981, have won the Miss USA title and competed in the Miss Universe pageant.  The current titleholder is Dinaleigh Baxter of Winchester.

Rosemary Siemens: Rosemary Siemens is a violinist and singer, formerly from Plum Coulee, Manitoba.  She has received a considerable amount of recognition, and has collaborated with artists such as Roy Tan, Eli Bennett, Orlando and Grace Sukkau, and Mary Zilba.

Mary Zilba: Mary Zilba is an American singer and television personality best known for her singing career in Canada and her reign as Miss Ohio (Miss America Pageant).  She was one of the main cast members of "The Real Housewives of Vancouver".

Miss Ohio: The Miss Ohio Scholarship Program (aka the Miss Ohio pageant) selects the representative for the U.S. state of Ohio to compete for the title of Miss America.  The pageant is held annually, during the "Miss Ohio Festival" week, at the historic 1,600 seat Renaissance Theatre (originally named the Ohio Theatre) in Mansfield.

Miss America 1938: Miss America 1938, the 12th Miss America pageant, was held at the Steel Pier in Atlantic City, New Jersey on September 10, 1938.  The decision by the 15 judges there that Miss Ohio, Marilyn Meseke, rather than Miss California, Claire James, as Miss America surprised the audience at the event.  Famous Broadway producer Earl Carroll, "Murder at the Vanities", also disagreed with their choice and took the runner-up to New York City where he performed a coronation of Miss California as "the true Miss America" shortly after the official pageant.  Carroll's actions resulted in widespread publicity of the incident.

Lindsay Davis (model): Lindsay Davis (born November 6, 1985) is an American model and beauty queen who has been internationally published in magazines such as "Ralph" and "FHM".  She was crowned Miss Ohio U.S. International in 2010, Miss Ohio United States 2011 and was also a finalist in the Miss Ohio USA pageant for both 2010 and 2011.

Siemens Foundation: The Siemens Foundation is a non-profit organization in the United States, established by Siemens AG in 1998.  It is responsible for the Siemens Competition (formerly Siemens Westinghouse Competition), a prestigious science award for U.S. high school students, which Siemens established after its 1997 acquisition of Westinghouse Electric Corporation turned out not to include the rights to the existing Westinghouse Science Talent Search (now sponsored by Intel).  The Siemens Foundation is also responsible for the Siemens Science Day (established in 2005) for promoting math and science education, the Siemens AP Scholar Award, and National Merit Finalist scholarships to children of Siemens employees.

Supporting paragraphs: Rosemary Siemens Mary Zilba
Answer: Mary Zilba