Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Season | Conf. | Conf. finish | Div. | Div. Finish | Head coach |
| --- | --- | --- | --- | --- | --- |
| 1946–47 | — | — | Eastern | 5th | John Russell |
| 1947–48 | — | — | Eastern | 3rd # | John Russell |
| 1948–49 | — | — | Eastern | 5th | Alvin Julian |
| 1949–50 | — | — | Eastern | 6th | Alvin Julian |
| 1950–51 | — | — | Eastern | 2nd # | Red Auerbach |
| 1951–52 | — | — | Eastern | 2nd # | Red Auerbach |
| 1952–53 | — | — | Eastern | 3rd # | Red Auerbach |
| 1953–54 | — | — | Eastern | T-2nd # | Red Auerbach |
| 1954–55 | — | — | Eastern | 3rd # | Red Auerbach |
| 1955–56 | — | — | Eastern | 2nd # | Red Auerbach |
| 1956–57 | — | — | Eastern ^ | 1st ^ | Red Auerbach |
| 1957–58 | — | — | Eastern ^ | 1st ^ | Red Auerbach |
| 1958–59 | — | — | Eastern ^ | 1st ^ | Red Auerbach |
| 1959–60 | — | — | Eastern ^ | 1st ^ | Red Auerbach |
| 1960–61 | — | — | Eastern ^ | 1st ^ | Red Auerbach |
| 1961–62 | — | — | Eastern ^ | 1st ^ | Red Auerbach |
| 1962–63 | — | — | Eastern ^ | 1st ^ | Red Auerbach |
| 1963–64 | — | — | Eastern ^ | 1st ^ | Red Auerbach |
| 1964–65 | — | — | Eastern ^ | 1st ^ | Red Auerbach |
| 1965–66 | — | — | Eastern | 2nd # | Red Auerbach |
| 1966–67 | — | — | Eastern | 2nd # | Bill Russell |
| 1967–68 | — | — | Eastern | 2nd # | Bill Russell |
| 1968–69 | — | — | Eastern | 4th # | Bill Russell |
| 1969–70 | — | — | Eastern | 6th | Tom Heinsohn |
| 1970–71 | Eastern | 5th | Atlantic | 3rd | Tom Heinsohn |
| 1971–72 | Eastern | 1st # | Atlantic ^ | 1st ^ | Tom Heinsohn |
| 1972–73 | Eastern | 1st # | Atlantic ^ | 1st ^ | Tom Heinsohn |
| 1973–74 | Eastern * | 1st * | Atlantic ^ | 1st ^ | Tom Heinsohn |
| 1974–75 | Eastern | 1st # | Atlantic ^ | 1st ^ | Tom Heinsohn |
| 1975–76 | Eastern * | 1st * | Atlantic ^ | 1st ^ | Tom Heinsohn |
| 1976–77 | Eastern | 4th # | Atlantic | 2nd | Tom Heinsohn |
| 1977–78 | Eastern | 8th | Atlantic | 3rd | Tom Heinsohn Tom Sanders |
| 1978–79 | Eastern | 10th | Atlantic | 5th | Tom Sanders Dave Cowens |
| 1979–80 | Eastern | 1st # | Atlantic ^ | 1st ^ | Bill Fitch |
| 1980–81 | Eastern * | 1st * | Atlantic ^ | 1st ^ | Bill Fitch |
| 1981–82 | Eastern | 1st # | Atlantic ^ | 1st ^ | Bill Fitch |
| 1982–83 | Eastern | 3rd # | Atlantic | 2nd | Bill Fitch |
| 1983–84 | Eastern * | 1st * | Atlantic ^ | 1st ^ | K. C. Jones |
| 1984–85 | Eastern * | 1st * | Atlantic ^ | 1st ^ | K. C. Jones |
| 1985–86 | Eastern * | 1st * | Atlantic ^ | 1st ^ | K. C. Jones |
| 1986–87 | Eastern * | 1st * | Atlantic ^ | 1st ^ | K. C. Jones |
| 1987–88 | Eastern | 1st # | Atlantic ^ | 1st ^ | K. C. Jones |
| 1988–89 | Eastern | 8th # | Atlantic | 3rd | Jimmy Rodgers |
| 1989–90 | Eastern | 4th # | Atlantic | 2nd | Jimmy Rodgers |
| 1990–91 | Eastern | 2nd # | Atlantic ^ | 1st ^ | Chris Ford |
| 1991–92 | Eastern | 2nd # | Atlantic ^ | 1st ^ | Chris Ford |
| 1992–93 | Eastern | 4th # | Atlantic | 2nd | Chris Ford |
| 1993–94 | Eastern | 10th | Atlantic | 5th | Chris Ford |
| 1994–95 | Eastern | 8th # | Atlantic | 3rd | Chris Ford |
| 1995–96 | Eastern | 11th | Atlantic | 5th | M. L. Carr |
| 1996–97 | Eastern | 15th | Atlantic | 7th | M. L. Carr |
| 1997–98 | Eastern | 12th | Atlantic | 6th | Rick Pitino |
| 1998–99 | Eastern | 12th | Atlantic | 5th | Rick Pitino |
| 1999–00 | Eastern | 10th | Atlantic | 5th | Rick Pitino |
| 2000–01 | Eastern | 9th | Atlantic | 5th | Rick Pitino Jim O'Brien |
| 2001–02 | Eastern | 3rd # | Atlantic | 2nd | Jim O'Brien |
| 2002–03 | Eastern | 6th # | Atlantic | 3rd | Jim O'Brien |
| 2003–04 | Eastern | 8th # | Atlantic | 4th | Jim O'Brien John Carroll |
| 2004–05 | Eastern | 3rd # | Atlantic ^ | 1st ^ | Doc Rivers |
| 2005–06 | Eastern | 11th | Atlantic | 3rd | Doc Rivers |
| 2006–07 | Eastern | 15th | Atlantic | 5th | Doc Rivers |
| 2007–08 | Eastern * | 1st * | Atlantic ^ | 1st ^ | Doc Rivers |
| 2008–09 | Eastern | 2nd # | Atlantic ^ | 1st ^ | Doc Rivers |
| 2009–10 | Eastern * | 4th * | Atlantic ^ | 1st ^ | Doc Rivers |
| 2010–11 | Eastern | 3rd # | Atlantic ^ | 1st ^ | Doc Rivers |
| 2011–12 | Eastern | 4th # | Atlantic ^ | 1st ^ | Doc Rivers |
| 2012–13 | Eastern | 7th # | Atlantic | 3rd | Doc Rivers |
Question:
What was the division when Jim O'Brien was the head coach and the team finished 2nd in the division?
Answer:
Atlantic