You're given a fill-in-the-blank question where the answer is PersonX. You need to minimally change the given question so that the answer flips to PersonY. This task typically involves replacing one word i.e., the 'trigger word' with its antonym (e.g., changing from "sympathetic" to "stern"). You should not change any content in the given question beyond a word or two i.e. the trigger word/phrase. PersonX and PersonY should not be equally likely to fill the blank. For your question, PersonY should be a well-agreed answer to fill in the blank. Your generations should NOT contain potentially explicit, offensive, or adult content. Do not use the names of real people or generic names (e.g., Donald Trump, John Doe, etc.) in your question. Avoid repeating the same style or phrase in generating your modified question e.g. this task can be always solved using a simple negation i.e. by adding not, never, etc. Instead, try to increase the word diversity. Your question must contain at least 15 and at most 30 words. Your question must have at least 70% overlapping words with the given question. You must utilize the given context word while writing the question. Your question must contain only one blank. Make sure that PersonX and PersonY have the same gender. In your question, PersonX and PersonY should be used only ONCE and PersonX should appear earlier than PersonY. Although there are many correct answers, you only need to write one of them.

Context Word: ghost. 
Question: PersonX told PersonY about a ghost that haunts the house,  but _ failed to frighten her. 
Answer: PersonX
PersonX told PersonY about a ghost that haunts the house,  but _ failed to believe her.

Context Word: substitute. 
Question: PersonX was asked by PersonY which ingredients to substitute in a recipe because _ is a wonderful cook. 
Answer: PersonX
PersonX was asked by PersonY which ingredients to substitute in a recipe because _ is a novice cook.

Context Word: flies. 
Question: PersonX has a really big problems with flies and asks for PersonY's help, because _ wants to get rid off flies. 
Answer: PersonX

PersonX has a really big problems with flies and asks for PersonY's help, because _ had the same problem.