In this task, you will be presented with a context passage, a question about that paragraph, and a possible answer to that question. The task is to check the validity of the answer. Answer with "Yes" or "No".

Surviving being shot and stabbed at the end of the previous film , the stepfather has been institutionalized in Puget Sound , Washington since , spending his time building model houses in the workshop . Assigned a new doctor named Joseph Danvers the stepfather begins confiding in him to gain his trust , ultimately murdering the doctor during a session by stabbing him in the neck with a blade smuggled out of the workshop . After killing Danvers the stepfather beats a suspicious guard named Ralph Smith to death with his own nightstick with only two strikes and takes his uniform , successfully sneaking out of the sanitarium . Checking into a hotel after robbing and murdering a traveling salesman the stepfather alters his appearance , takes the name Doctor Gene F. Clifford from the newspaper obituaries and travels to Palm Meadows , Los Angeles after seeing an ad for it on an episode of Dream House . Gene arrives in Palm Meadows and meets real estate agent Carol Grayland and leases a house just across the street from her and her son Todd . During a session with the wives of the neighborhood , Gene learns Carol 's dentist husband , Philip had absconded with his mistress the previous year . Gene begins courting Carol , eventually winning over her and Todd . Gene 's plan to marry Carol is soon complicated when Phil returns , wanting to reconcile with his wife . Needing Phil out of the way , Gene persuades Carol to send Phil over for a meeting , during which Gene kills him with a broken bottle , covering up Phil 's disappearance afterward by arranging it so that it looks as though he simply ran off again . <sep>Which three items does the stepfather use to kill Joseph, Ralph and Phil?<sep>(other permutations)
No