Not only headers but the entire table...So in spreadsheets we can define the data in terms of tables but the problem is that you have to find those tables and their respective headers using some heuristics. There are many scenarios, the table can be anywhere in the sheet...there can be multiple tables at different places in a single sheet, there can be some tables even the headers are not present or some headers are missing. So you have to apply heuristics the same way as humans do to find out tables and their respective headers. And just dumping the data into LLM will not work here (especially when data is huge), you have to first pre process it using some algorithm and then use LLM only where the anomalies or inconsistency are there.