{"text_format":"3","workbook":"xls","n_sheets":2,"sheets":["insert_1","insert_2"],"read":"whole","date_system":"1900","formulas":"cached_only"}

{"sheet":"insert_1","index":0,"n_rows":3,"n_cols":5,"rows_kept":3,"flags":["formulas_cached_only"]}
["int","decimal","bool","varchar","datetime"]
[4,9.1,true,"Line 2 updated","2020-01-01"]
[8,9.123,false,"Line 4 updated","2020-01-01"]

{"sheet":"insert_2","index":1,"n_rows":3,"n_cols":5,"rows_kept":3,"flags":["formulas_cached_only"]}
["int","decimal","bool","varchar","datetime"]
[4,9.1,true,"Line 2 updated","2020-01-01"]
[8,9.123,false,"Line 4 updated","2020-01-01"]