Table:
cancer group
average number of cases per year
annual incidence rate
percent (%) of childhood cancer cases

all cancers
905
161
100

leukemias
292
52
32

cns tumours
173
31
19

lymphomas
100
18
11

neuroblastomas
71
13
8

soft tissue sarcomas
59
10
6

the 7th row,
the 4th column,
the 2nd row,
the 3rd row,
Extract the contents of cells in the above rows or columns, identified by row or column indices. The cells of every row or column should be presented in the JSON format of {"row_id/column_id":"<row or column index>", "cell_list":"<a list of cells in this row/column>"}, e.g., {"row_id":"3", "cell_list": ["xxx", "yyy", "zzz"]}.

The cell values of target rows or columns are as follows:
For the 7th row: {"row_id": "7", "cell_list": ['soft tissue sarcomas', '59', '10', '6']}
For the 4th column: {"column_id": "4", "cell_list": ['percent (%) of childhood cancer cases', '100', '32', '19', '11', '8', '6']}
For the 2nd row: {"row_id": "2", "cell_list": ['all cancers', '905', '161', '100']}
For the 3rd row: {"row_id": "3", "cell_list": ['leukemias', '292', '52', '32']}