Student A:Passage: This article includes lists of supercentenarians from the United States (people from the United States who have attained the age of at least 110 years). The Gerontology Research Group (GRG), an organization that tracks supercentenarians and validates longevity claims, has validated claims of over 700 American supercentenarians and as of 15 July 2018, lists six verified living American supercentenarians, the oldest of whom is Lessie Brown, born September 22, 1904, aged 113 years, 296 days. The oldest person ever from the United States was Sarah Knauss, who died on December 30, 1999, aged 119 years, 97 days.

Question: Based on this passage, who is the oldest living person in the united states?
Student B:OK... This is the relevant information: The Gerontology Research Group (GRG), an organization that tracks supercentenarians and validates longevity claims, has validated claims of over 700 American supercentenarians and as of 15 July 2018, lists six verified living American supercentenarians, the oldest of whom is Lessie Brown, born September 22, 1904, aged 113 years, 296 days.
Lessie Brown.

Student A:The Chief Election Commissioner heads the Election Commission of India, a body constitutionally empowered to conduct free and fair elections to the national and state legislatures and of President and Vice-President. Chief Election Commissioner of India is usually a member of the Indian Civil Service and mostly from the Indian Administrative Service. It is very difficult to remove the authority of the Chief Election Commissioner once appointed by the president, as two-thirds of the Lok Sabha and the Rajya Sabha need to vote against him for disorderly conduct or improper actions.

Based on this passage, who has the power to remove chief election commissioner?
Student B:OK... The relevant information to answer the above question is: It is very difficult to remove the authority of the Chief Election Commissioner once appointed by the president, as two-thirds of the Lok Sabha and the Rajya Sabha need to vote against him for disorderly conduct or improper actions.
the Lok Sabha and the Rajya Sabha.

Student A:The appointment and confirmation of Justices to the Supreme Court of the United States involves several steps set forth by the United States Constitution, which have been further refined and developed by decades of tradition. Candidates are nominated by the President of the United States and must face a series of hearings in which both the nominee and other witnesses make statements and answer questions before the Senate Judiciary Committee, which can vote to send the nomination to the full United States Senate. Confirmation by the Senate allows the President to formally appoint the candidate to the court.

Based on this passage, who approves presidential appointments to the supreme court?
Student B:OK... The relevant information to answer the above question is: Confirmation by the Senate allows the President to formally appoint the candidate to the court.
the Senate.

Student A:Mark first appears in season two, introduced as a highly respected otolaryngologist sub-specialized in plastic surgery and the childhood best friend of neurosurgeon Derek Shepherd (Patrick Dempsey). Derek explains that Mark had an affair with his wife, Addison (Kate Walsh) while they were living in New York. Mark travels to Seattle, intent on convincing Addison to return with him, but his offer is rejected and Derek declines to renew their friendship. Mark returns during season three at Addison's drunken behest, but she again rejects him once sober. Undeterred, Mark sells his successful private practice (which he previously shared with Derek) and takes over the plastics program at Seattle Grace Hospital. During Meredith's morphine rampage, Mark finds out about his nickname McSteamy which was given to him by her during his first trip to Seattle back when he attempted to get Addison back and earn Derek's friendship back. It is later revealed that Mark has at some point slept with all of Derek's sisters. Mark has a brief fling with Addison's friend, orthopedic surgeon Callie Torres (Sara Ramirez), and develops a friendship with Derek's girlfriend, intern Meredith Grey (Ellen Pompeo). It is revealed that after Derek left New York, Mark and Addison continued their relationship for two months, during which she conceived and aborted his child. Just weeks after moving to Seattle he quickly observes that Derek's true love was Meredith and tries to convince Addison that her marriage with Derek was over. Mark enters into a sixty-day abstinence pact with Addison, agreeing that if they can remain celibate for that time, Addison will give their relationship another chance. Addison ultimately breaks the pact by having sex with intern Alex Karev (Justin Chambers), and soon thereafter departs from Seattle to work in Los Angeles.

Answer this question: when does mark show up in grey anatomy?
Student B:
OK... The relevant information is: Mark first appears in season two, introduced as a highly respected otolaryngologist sub-specialized in plastic surgery and the childhood best friend of neurosurgeon Derek Shepherd (Patrick Dempsey).
season two.