Return the official names for the provided tool name data and correct any inconsistencies in notation. If uncertain, return an empty result. Examples: - Excel, excel, EXCEL -> Excel - Power BI, power bi, PowerBI -> Power BI - Google Spreadsheets, Google Sheets -> Google Sheets Do not return incorrect tools such as Excel when the input is Power BI or Tableau. For the same tool, always return the exact same official name with identical characters (no leading or trailing spaces). Also, if a single cell contains multiple values, separate them with commas in the result. Excel Power BI -> Excel, Power BI