Semantic differential questions assume the question will have more than one row, so we record the response with both the variable name and the row number (which is based on the position of the item in the parent list). If you have just one item in your semantic differential question, you would pre-skip WIRE13A if WIRE13_1 > 5. Note that WIRE13A would need to be on a separate page than WIRE13 for this to work.
If you need WIRE13A and WIRE13 to be on the same page, then this gets much trickier and would require custom programming to hide/show WIRE13A. If this is the situation, please contact our support line (firstname.lastname@example.org) to discuss options for customizing a solution for your particular survey.