Task: Question Answering
Input (English): Passage: Despite their appreciation of his work, many of Glicken's associates considered him eccentric and highly disorganized. Chatty, noted for being extremely sensitive, Glicken also paid meticulous attention to detail. One of his friends writes, "Harry was a character his whole life. ... Everyone who knew him was amazed he was such a good scientist." Regarding Glicken's driving habits, the same acquaintance describes him as "a cartoon character" who "would drive at full speed down the road, talking about whatever was important to him, and ... come to a four-way stoplight and he'd sail through it, never knowing he'd just gone through".Glicken's father said in 1991 that his son died pursuing his passion, and that he was "totally absorbed" with volcanology. United States Geological Survey co-worker Don Peterson adds that Glicken was keen in his enthusiastic approach to observation, and praises his accomplishments throughout his career and as a graduate student. Speaking about Glicken's personal passion for his field, his mentor and professor Richard V. Fisher writes, "What happened at St. Helens is something that troubled [Glicken] deeply for a very long time, and, in a way, I think it made him even more dedicated than he was before." Associate Robin Holcomb remarks that "Harry was very enthusiastic, very bright, and very ambitious, ambitious to do something worthwhile on volcanoes." Many studies have utilized Glicken's criteria for volcanic landslide recognition, and many subsequent papers on avalanches have acknowledged or referenced Glicken's 1996 report. Reflecting on Glicken's body of work, USGS employee Don Swanson names him as "a world leader in studies of volcanic debris avalanches".Glicken was closely connected to the University of California, Santa Barbara, where he earned his doctorate and conducted research. To remember his association with the university, each year the Department of Earth Science awards an outstanding graduate geology student the "Harry Glicken Memorial Graduate Fellowship", established by the Harry Glicken Fund, which aims to support students "who will pursue research relating to the understanding of volcanic processes". 
Question: What is the last name of the person who thinks what happened at St. Helens made Glicken even more dedicated than he was before?
Output (English): Fisher.