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\nAttendance | Record |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 75 | April 1 | @ Sacramento | W 99–90 | Raymond Felton (17) | Nenê (12) | Nenê (6) | Power Balance Pavilion\n15,871 | 46–29 |
| 76 | April 3 | @ L.A. Lakers | W 95–90 | Danilo Gallinari (22) | Kenyon Martin (8) | Ty Lawson (8) | Staples Center\n18,997 | 47–29 |
| 77 | April 5 | Oklahoma City | L 94–101 | Ty Lawson (28) | Nenê (8) | Ty Lawson (5) | Pepsi Center\n18,203 | 47–30 |
| 78 | April 6 | @ Dallas | W 104–96 | J. R. Smith (23) | Nenê (15) | Ty Lawson (8) | American Airlines Center\n20,364 | 48–30 |
| 79 | April 8 | @ Oklahoma City | L 89–104 | Nenê (18) | Kenyon Martin (13) | Ty Lawson (6) | Oklahoma City Arena\n18,203 | 48–31 |
| 80 | April 9 | Minnesota | W 130–106 | Ty Lawson (37) | Kenyon Martin,\nJ. R. Smith (8) | Raymond Felton (14) | Pepsi Center\n19,155 | 49–31 |
| 81 | April 11 | Golden State | W 134–111 | J. R. Smith (22) | Chris Andersen (12) | Raymond Felton (10) | Pepsi Center\n19,155 | 50–31 |
| 82 | April 13 | @ Utah | L 103–107 | Wilson Chandler (27) | Chris Andersen (10) | Wilson Chandler,\nGary Forbes,\nAl Harrington,\nTy Lawson,\nJ. R. Smith (3) | EnergySolutions Arena\n19,051 | 50–32 |
Question:
what is the number of high rebounds kenyon martin scored in april of this season?
Answer:
29