Find string and return N rows beneath it

Hi all - I’m very new to KNIME and I have what I think is an easy problem, but have been stumped with current solutions for over a week…

I have dozens of semi-unstructured google sheets as input, each with a cell containing the text “Plates” and then up to 12 cells underneath it with comma separated numbers. I have figured out how to loop over each sheet using flow variables.

Unfortunately the “Plates” text is in a different location in each sheet. I am able to use a Column Expressions node to find the text in an array (not sure that is the most efficient use), but then I’m stumped at how to retrieve values from rows beneath it.

e.g.

Plates

1,2,3,4

5,6,7,8

13,14,15,16

82,83,84,85

91,92,93,94

…

Ultimately, I’d like to output a new column with just the first number of each list, e.g.

FirstPlate

1

5

13

82

91

…

but I’d be happy with just learning how to retrieve 12 rows under my target text search. I can do the comma splitting later.

Thanks for any help anyone can provide!