How to Extract information from an excel sheet of a particular format

datatable
excel

#1

[image|634x441](upload://lQ5QQb74a6bqDy7PImage.zip (121.3 KB)
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Hello,
This is how my input file looks like (PFA the image). I need to separate different sections in this sheet so that I could work individually on them or maybe work on it without separating the same.
I have the “portfolio” name with me and on the basis of it I need to extract the values of the columns: “subdomains”, “versions” and “platforms”