Table:
1999 Jiji earthquake

UTC time	1999-09-20 17:47:16
ISC event	1718616
USGS-ANSS	ComCat
Local date	21 September 1999; 24 years ago (1999-09-21)
Local time	01:47:12 local time
Magnitude	7.7 Mw / 7.3 ML
Depth	33 km (20.5 mi)
Epicenter	Jiji (Chi-Chi), Nantou, Taiwan
23°46′19″N 120°58′55″E﻿ / ﻿23.772°N 120.982°E﻿ / 23.772; 120.982
Areas affected	Taiwan
Peak acceleration	1.92 g[1]
Peak velocity	184.58 cm/s
Casualties	2,415 killed
29 missing
11,305 injured
51,711 buildings destroyed
53,768 buildings damaged

Could you calculate the row number and column number in this table? The final result should be presented in the JSON format of {"row_number": "m", "column_number": "n"}.

There are 12 rows and 2 columns in the table. So, the final answer is {"row_number": "12", "column_number": "2"}.