I want to know the answer to the following question:
Who used a semiotics method to study comics in the 1970s?
All the background I'm provided with is that "Pierre Fresnault-Deruelle then took a semiotics approach to the study of comics, analyzing text–image relations, page-level image relations, and image discontinuities, or what Scott McCloud later dubbed "closure".". Is that enough to answer the question?
Answer: yes