Is there a way to limit the number of returned efetch (text, tabular) terms with just the entrez api (not entrez direct)

Question

[DNAlias]

I'm trying to parse some results from efetch queries as a table using wget, but some of the columns that are being returned are very difficult to parse. Is there a way to limit the number of returned efetch terms with just the entrez api (not entrez direct)?

[Pierre Lindenbaum]

but some of the columns that are being returned are very difficult to parse

Is there a way to limit the number of returned efetch terms

what is the relation between those two sentences ? what are those 'columns' ?