{"text_format":"3","workbook":"xls","n_sheets":3,"sheets":["Sheet1","Sheet2","Sheet3"],"not_rendered":{"charts":2,"external_links":1},"read":"whole","date_system":"1900","formulas":"cached_only"}

{"sheet":"Sheet1","index":0,"n_rows":10,"n_cols":3,"rows_kept":10,"flags":["formulas_cached_only"]}
["defense","wars","trade"]
[1,6.73,1345]
[2,6.21,1543]
[3,6.04,1704]
[4,5.83,1830]
[5,5.52,2000]
[6,5.23,2168]
[7,4.9,2306]
[8,4.51,2428]
[9,4.01,2509]

{"sheet":"Sheet2","index":1,"n_rows":0,"n_cols":0,"rows_kept":0,"flags":["formulas_cached_only"]}

{"sheet":"Sheet3","index":2,"n_rows":0,"n_cols":0,"rows_kept":0,"flags":["formulas_cached_only"]}