Table:
Duisburg–Quakenbrück railway
Native name	Bahnstrecke Duisburg–Quakenbrück
Locale	North Rhine-Westphalia, Germany
Line number

2320 (Duisburg – Oberhausen)
2280 (Oberhausen – Osterfeld)
2262 (Osterfeld – Bottrop)
2273 (Bottrop – Quakenbrück)

Line length	173 km (107 mi)
Number of tracks	Double track,Sigle – Oberhausen-Osterfeld
junction only
Track gauge	1,435 mm (4 ft 8 1⁄2 in) standard gauge
Electrification	15 kV/16.7 Hz AC overhead catenary
Operating speed	90 km/h (56 mph) (maximum)
Route number	424 (Dorsten – Coesfeld)

Analyze the provided table and extract the contents of cells located at the specified positions, identified by row and column indices. Format each cell value as a JSON, using the structure {"row_id":"m", "column_id":"n", "cell_value":"<Corresponding Cell Value>"}.
Positions:
row 9 and column 1,
row 4 and column 1,
row 7 and column 2,
row 5 and column 1,
row 6 and column 2,
row 10 and column 2,

The extracted cell contents are listed below.
{"row_id":"9", "column_id":"1", "cell_value":"Operating speed"}
{"row_id":"4", "column_id":"1", "cell_value":"Line number"}
{"row_id":"7", "column_id":"2", "cell_value":"1,435 mm ( 4 ft 8 1 ⁄ 2 in ) standard gauge"}
{"row_id":"5", "column_id":"1", "cell_value":"Line length"}
{"row_id":"6", "column_id":"2", "cell_value":"Double track, Sigle – Oberhausen-Osterfeld junction only"}
{"row_id":"10", "column_id":"2", "cell_value":"424 (Dorsten – Coesfeld)"}