Question: Assigning variables in a list to another variable in the list

I have a vector of lists, and each list is composed of indexed names.  For each list, I would like to assign all the indexed names in the list to the first variable of the list.  Right now, I'm trying to select the entries of the list using the op command and then assign one to the other, and get the following error:

Error, invalid left hand side in assignment


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