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 |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 16.0 | December 3 | @ Philadelphia | W 88–79 | J. Smtih (22) | A. Horford (13) | J. Johnson (7) | Wachovia Center 11,465 | 7–9 |
| 17.0 | December 4 | Detroit | L 95–106 | J. Childress (18) | A. Horford (10) | A. Johnson , S. Stoudamire (3) | Philips Arena 12,754 | 7–10 |
| 18.0 | December 6 | Minnesota | W 90–89 | J. Smith (28) | A. Horford (15) | A. Johnson (6) | Philips Arena 12,232 | 8–10 |
| 19.0 | December 8 | Memphis | W 86–78 | J. Smith (25) | A. Horford (14) | A. Johnson (8) | Philips Arena 15,658 | 9–10 |
| 20.0 | December 10 | @ Orlando | W 98–87 | J. Smith (25) | J. Smith (15) | J. Smith , A. Johnson (5) | Amway Arena 16,821 | 10–10 |
| 21.0 | December 11 | Toronto | L 88–100 | J. Johnson , M. Williams (23) | A. Horford (10) | A. Law (6) | Philips Arena 13,173 | 10–11 |
| 22.0 | December 14 | @ Detroit | L 81–91 | J. Johnson (23) | L. Wright (12) | A. Johnson , J. Smith (3) | The Palace of Auburn Hills 22,076 | 10–12 |
| 23.0 | December 15 | Charlotte | W 93–84 | J. Johnson (31) | J. Smith (10) | A. Johnson (7) | Philips Arena 14,040 | 11–12 |
| 24.0 | December 17 | Utah | W 116–111 | J. Johnson (26) | J. Smith (12) | A. Johnson (14) | Philips Arena 15,263 | 12–12 |
| 25.0 | December 19 | Miami | W 114–111(OT) | M.Williams (26) | M.Williams (9) | A.Johnson , J.Johnson (9) | Philips Arena 17,069 | 13–12 |
| 26.0 | December 21 | @ Washington | W 97–92 | J. Johnson (32) | J. Smith (14) | J. Johnson , A. Johnson (8) | Verizon Center 16,472 | 14–12 |
| 27.0 | December 26 | Indiana | W 107–95 | J. Johnson (26) | S. Williams (10) | J. Johnson (11) | Philips Arena 16,070 | 15–12 |
| 28.0 | December 29 | @ Dallas | L 84–97 | M. Williams (18) | A. Horford (10) | J. Johnson (5) | American Airlines Center 20,338 | 15–13 |
Question:
Who had the highest rebounds of the game with A. Johnson (6) as the highest assist?
Answer:
A. Horford (15)