How to have in result question the names in the question titles instead piped text code

Hi all,
I created a survey for my students and I used Loop & Merge in a Block to have 5 question about one course.
In the main block the student selects the courses where he/belongs and in the next block I have the five question to repeat for the courses, in the questions I'm using Loop & Merge and Piped Text to customize the question.
After collet the answers when I see the results (inside reports option) the questions said [Field-1] instead Administration or System or Math, and in the details I see ${lm://Field/2} instead the name of the professor,
How can I see the names instead of the codes?