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:
| Res. | Record | Opponent | Method | Event | Date | Round | Time | Location | Notes |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Loss | 5–3 | Alistair Overeem | TKO (kick to the body & punches) | UFC 141 | December 30, 2011 | 1 | 2:26 | Las Vegas, United States | Announced retirement after fight |
| Loss | 5–2 | Cain Velasquez | TKO (punches) | UFC 121 | October 23, 2010 | 1 | 4:12 | Anaheim, California, United States | Lost UFC Heavyweight Championship |
| Win | 5–1 | Shane Carwin | Submission (arm triangle choke) | UFC 116 | July 3, 2010 | 2 | 2:19 | Las Vegas, United States | Defended UFC Heavyweight Championship. Unified UFC Interim Heavyweight Championship; Submission of the Night |
| Win | 4–1 | Frank Mir | TKO (punches) | UFC 100 | July 11, 2009 | 2 | 1:48 | Las Vegas, United States | Defended UFC Heavyweight Championship. Unified UFC Interim Heavyweight Championship |
| Win | 3–1 | Randy Couture | TKO (punches) | UFC 91 | November 15, 2008 | 2 | 3:07 | Las Vegas, United States | Won UFC Heavyweight Championship. |
| Win | 2–1 | Heath Herring | Decision (unanimous) | UFC 87 | August 9, 2008 | 3 | 5:00 | Minneapolis, Minnesota, United States |  |
| Loss | 1–1 | Frank Mir | Submission (kneebar) | UFC 81 | February 2, 2008 | 1 | 1:30 | Las Vegas, United States | UFC Debut |
| Win | 1–0 | Min-Soo Kim | Submission (punches) | Dynamite!! USA | June 2, 2007 | 1 | 1:09 | Los Angeles, United States | MMA Debut |
Question:
how many fights lasted at least 2 rounds?
Answer:
4