Question: What season does meredith and derek get married in grey's anatomy?

Disambiguated questions and answers:
context: No context provided
question: In what season do Meredith and Derek get legally married in Grey's Anatomy?
short_answers: Season 7
season seven
season 7
context: In seasons three and four, Meredith and Derek's relationship becomes rocky, and they each take time to date, other people. Derek's plans to propose were ruined by a series of unfortunate events in season five. In the season finale, they decide to give their planned wedding to Alex and Izzie. Due to their tight schedule, they instead informally marry, and Derek writes down their "promises" on a post-it note. They legalize their marriage in season seven to adopt Zola, a young African orphan treated for spina bifida. They briefly separate after Meredith tampers with their Alzheimer's trial, jeopardizing her career and tarnishing Derek's reputation. Zola is taken away from Meredith after a social worker finds out she and Derek are living separately. In later seasons, Derek often griped about how his subsequent interns and residents – mainly Lexie Grey, Shane Ross, and Heather Brooks – did not quite measure up to Meredith. The social worker comes back and announces they are the official parents of Zola. As Meredith nears the end of her fifth year of residency, she and Derek are torn between staying at Seattle Grace Mercy West or leaving for Boston where Derek would work at Harvard while Meredith would be at the Brigham and Women's Hospital.
question: In what season do Meredith and Derek get informally married in Grey's Anatomy?
short_answers: season five
season 5
Season 5
wikipage: Derek Shepherd

Long-form answers:
knowledge: content: Grey's Anatomy is an American medical drama television series that premiered on March 27, 2005, on the American Broadcasting Company (ABC) as a mid-season replacement.
wikipage: Grey's Anatomy
content: The fictional series focuses on the lives of surgical interns, residents, and attendings as they develop into seasoned doctors while balancing personal and professional relationships.
wikipage: Grey's Anatomy
content: The series revolves around the title character, Dr. Meredith Grey, played by Ellen Pompeo.
wikipage: Grey's Anatomy
long_answer: Grey's Anatomy is an American medical drama television series that focuses on the lives of surgical interns, residents, and attendings as they develop into seasoned doctors while balancing personal and professional relationships. The series revolves around the title character, Dr. Meredith Grey. Meredith and Derek informally get married in Season 5. In Season 7, the get legally married.
knowledge: content: Grey's Anatomy is an American medical drama television series that premiered on March 27, 2005, on the American Broadcasting Company (ABC) as a mid-season replacement. The fictional series focuses on the lives of surgical interns, residents, and attendings as they develop into seasoned doctors while balancing personal and professional relationships.
wikipage: Grey's Anatomy
content: Meredith is the series's protagonist and title character, and was introduced as a surgical intern at the fictional Seattle Grace Hospital (later Seattle Grace-Mercy West Hospital, and afterwards Grey+Sloan Memorial), eventually obtaining the position of a surgical resident, and later the position of an attending, and in 2016, attaining the Chief of General Surgery position. As the daughter of world-renowned surgeon Ellis Grey, Meredith struggles with the everyday life of being in a competitive profession, maintaining the relationship with her one-night stand and eventual husband, Derek Shepherd, her motherhood, and her friendships with her colleagues.
wikipage: Meredith Grey
long_answer: Grey's Anatomy is an American medical drama television series that premiered on March 27, 2005 on ABC. The fictional series focuses on the lives of surgical interns, residents, and attendings as they develop into seasoned doctors while balancing personal and professional relationships. Meredith Grey is the series' protagonist and title character who marries Derek Shepherd. Derek's plans to propose were ruined by a series of unfortunate events in season five. In the season finale, they decide to give their planned wedding to Alex and Izzie. Due to their tight schedule, they instead informally marry, and Derek writes down their "promises" on a post-it note. They legalize their marriage in season seven to adopt Zola, a young African orphan treated for spina bifida.