Table:
Prefixes of Eastern European series

Soviet Union

Czechoslovakia

Poland

East Germany

5400

7400

5400

7400

8400

5400

6400

7400

7400

8400

74

133

К155

MH54

MH74

MH84

UCA54

UCA64

UCY74

D1

E1

74L

134

КР134

74H

130

К131

UCA64H

UCY74H

D2

E2

74S

530

КР531

MH54S

MH74S

MH84S

UCY74S

DS

74LS

533

К555

UCY74LS

DL

74AS

1530

КР1530

74ALS

1533

КР1533

MH54ALS

MH74ALS

74F

1531

КР1531

74HC

1564

КР1564

74HCT

U74HCT

74AC

1554

КР1554

74ACT

1594

КР1594

74LVC

5574

74VHC

5584

This image shows a table. Return the contents of cells at the indicated positions in the table. Positions are identified by row and column indices. Show the cell value in the JSON format {"row_id":"m", "column_id":"n", "cell_value":"<Corresponding Cell Value>"}.
Specified positions:
the 6th row and the 10th column
the 2nd row and the 4th column
the 5th row and the 10th column
the 16th row and the 7th column
the 15th row and the 4th column
the 4th row and the 1st column
the 8th row and the 7th column

The extracted cell contents are listed below.
{"row_id":"6", "column_id":"10", "cell_value":"ds"}
{"row_id":"2", "column_id":"4", "cell_value":"5400"}
{"row_id":"5", "column_id":"10", "cell_value":"d2"}
{"row_id":"16", "column_id":"7", "cell_value":"none"}
{"row_id":"15", "column_id":"4", "cell_value":"none"}
{"row_id":"4", "column_id":"1", "cell_value":"74l"}
{"row_id":"8", "column_id":"7", "cell_value":"none"}