Without more details on your Data Types and what data you are trying to group it’s hard to know exactly how to help. Does this example provide any clarity?
If it is the case you are wanting only certain fields to be shown out of your list then you could do something like this:
However, if you are arbitrarily trying to somehow pick the 1st and 3rd items out of the list and then the 7 and 10th items you might want to consider a different approach unless they will always be in that position on every record.