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:
| Game | Date | Team | Score | High points | High rebounds | High assists | Location Attendance | Record |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 74.0 | April 1 | Toronto | L 95–99 (OT) | Dwight Howard (30) | Dwight Howard (9) | Hedo Türkoğlu (6) | Amway Arena 17,461 | 55–19 |
| 75.0 | April 3 | Cleveland | W 116–87 (OT) | Rashard Lewis (22) | Dwight Howard (11) | Rafer Alston (10) | Amway Arena 17,461 | 56–19 |
| 76.0 | April 4 | @ Atlanta | W 88–82 (OT) | Dwight Howard (21) | Dwight Howard (23) | Dwight Howard (5) | Philips Arena 19,608 | 57–19 |
| 77.0 | April 7 | @ Houston | L 83–93 (OT) | Rashard Lewis (22) | Rashard Lewis (12) | Rashard Lewis , Hedo Türkoğlu (4) | Toyota Center 18,389 | 57–20 |
| 78.0 | April 8 | Memphis | W 81–78 (OT) | Hedo Türkoğlu (20) | Dwight Howard (13) | Hedo Türkoğlu (7) | Amway Arena 17,461 | 58–20 |
| 79.0 | April 10 | New York | L 95–105 (OT) | Hedo Türkoğlu (24) | Dwight Howard (14) | Hedo Türkoğlu , Rafer Alston (5) | Amway Arena 17,461 | 58–21 |
| 80.0 | April 11 | @ New Jersey | L 93–103 (OT) | Hedo Türkoğlu (16) | Dwight Howard (8) | Rafer Alston (8) | Izod Center 17,123 | 58–22 |
| 81.0 | April 13 | @ Milwaukee | L 80–98 (OT) | Courtney Lee (17) | Marcin Gortat (18) | Rafer Alston (4) | Bradley Center 14,683 | 58–23 |
| 82.0 | April 15 | Charlotte | W 98–73 (OT) | Tony Battie (21) | Dwight Howard (12) | Mickaël Piétrus (5) | Amway Arena 17,461 | 59–23 |
Question:
What is the highest rebounds for game 81?
Answer:
Marcin Gortat (18)