tokens: then there are different free and commercial libraries like ClosedXML ( free , XLSX only ) , EPPlus ( free , XLSX only ) , Aspose.Cells , SpreadsheetGear , LibXL and Flexcel etc .
ner_tags: O O O O O O O O O B-Library O O O B-File_Type O O O B-Library O O O B-File_Type O O O B-Library O B-Library O B-Library O B-Library O O