Table:
Iteration
Dates
Location
Attendance
Notes

GameStorm 10
March 2008
Red Lion - Vancouver, WA
750
-

GameStorm 11
March 26–29, 2009
Hilton - Vancouver, WA
736
debut of Video games, first-ever Artist Guest of Honor, Rob Alexander

GameStorm 12
March 25–28, 2010
Hilton - Vancouver, WA
802
Board games Guest of Honor: Tom Lehmann

GameStorm 13
March 24–27, 2011
Hilton - Vancouver, WA
984
Guests: Lisa Steenson, Michael A. Stackpole

GameStorm 14
March 22–25, 2012
Hilton - Vancouver, WA
1072
Boardgame:Andrew Hackard and Sam Mitschke of Steve Jackson Games - RPG: Jason Bulmahn

GameStorm 15
March 21–24, 2013
Hilton - Vancouver, WA
1188

GameStorm 16
March 20–23, 2014
Hilton - Vancouver, WA
tba
Guests: Mike Selinker, Shane Lacy Hensley, Lisa Steenson, Zev Shlasinger of Z-Man Games

For the shown table, how many rows and columns are there? Return the result as JSON in the format {"row_number": "m", "column_number": "n"}, e.g., {"row_number": "12", "column_number": "7"}.

There are 8 rows and 5 columns in the table. So, the final answer is {"row_number": "8", "column_number": "5"}.