Format a text for a proper analysis?

Hi, I am currently working on a project that takes song lyrics and grades their sentiment. I am formatting the text for a proper analysis and am coming across an issue. The first image I am posting is what the output should look like when I enter the function

Map[Select[#, StringLength[#] > 1 &] &, tokensPop]

The second image uses the same function except with a different text source. Both are formatted in the same manner, however the second image does not yield an output that I can work with. Any ideas as to how I can fix this?

Thank you,

Michael

Really difficult to guess without an actual minimal working example that elicits the problem. If I am reading the error message correctly, it looks like some of the items Select sees are atomic, whereas Select needs expressions with parts.

It looks to me like your first example is a list of a list, your second example is a flat list. As Daniel states, it’s hard to help more without an example.

Regards