Question: Please answer the following question about this movie plot. If it's un-answerable, please output "No answer".  Question: Who is Martin's chief rival? Movie plot title: Grosse Pointe Blank Movie plot: Professional assassin Martin Blank finds himself depressed, disenchanted and bored with his work. A major problem is his chief rival Grocer, whose effort to cartelize the hitman business puts him at potentially lethal odds with the unaffiliated Martin. Following a botched contract, Martin receives an invitation to his 10-year high school reunion in his hometown of Grosse Pointe, Michigan. Initially reluctant to attend, he is pressured into it by both his therapist, Dr. Oatman, and his secretary, Marcella. She books him a contract in Michigan that coincides with the reunion, ostensibly to smooth things over with the client whose contract was botched. Upon arriving in Grosse Pointe, Martin reconnects with his friend Paul and seeks out his high school sweetheart Debi Newberry, now a radio DJ, whom Martin had abandoned on prom night to enlist in the Army. When asked about his livelihood, Martin readily reveals that he is a professional killer, a response taken as a joke by everyone he meets. Meanwhile, Martin is being stalked by Felix LaPoubelle, who attempts to kill Martin in the convenience store that stands in place of his childhood home. He is also tailed by two National Security Agency agents who were tipped off to Martin's contract by Grocer. Despite these dangers, Martin remains distracted by his desire to make amends with Debi and fails to open the background dossier on his prospective target. At the reunion, Martin mingles with his former classmates, one of whom hands him her toddler. Martin then experiences an epiphany, recognizing that his recent disillusionment with his work and his amends with Debi signify an opportunity to change his life for good. Moments later, while exploring the halls, Martin is attacked by LaPoubelle, whom he kills in self-defense. Debi stumbles upon the scene and, horrified to find that Martin was not joking about his work after all, flees the reunion. Paul arrives only moments later to find Martin, who corrals him into helping to dispose of LaPoubelle's body in the school...
Answer:
Grocer