{"text_format":"3","workbook":"xls","n_sheets":1,"sheets":["Sheet1"],"read":"whole","date_system":"1900","formulas":"cached_only"}

{"sheet":"Sheet1","index":0,"n_rows":5,"n_cols":10,"rows_kept":5,"merged":[[1,8,1,9],[2,4,2,6],[2,9,2,12],[3,4,3,7],[4,9,4,12],[5,9,5,12]],"flags":["formulas_cached_only"]}
[]
[{"$nulls":8},2]
[{"$nulls":4},4,null,null,"X","=",200]
[{"$nulls":4},2]
[{"$nulls":6},"[","X","]=",10]