Matrix with interim questions

Hi there,
I was unable to find an answer to this online, so I'd like to try asking here - please let me know if anything similar has been answered.
I have a set of 15 vignettes consisting of a statement ("question"), and three options ("answers") that are rated based on on how true/typical they are for the respondent (Likert 1-7).
I was only able to add these questions as individual matrices, but I would like them, for the sake of simplicity, to be clustered into one big matrix with interim statements ("questions").
Is there such an option?
Thank you!