Q: In this task, you're given passages that contain mentions of names of people, places, or things. Some of these mentions refer to the same person, place, or thing. Your job is to write questions that evaluate one's understanding of such references. Good questions are expected to link pronouns (she, her, him, his, their, etc.) or other mentions to people, places, or things to which they may refer. Do not ask questions that can be answered correctly without understanding the paragraph or having multiple answers. Avoid questions that do not link phrases referring to the same entity. For each of your questions, the answer should be one or more phrases in the paragraph, and it should be unambiguous.
Passage: Helen and Jackson live together in New York City. At the beginning of the film, the two are driving towards the Kentucky farmhouse, Kilronan, where Jackson grew up, primarily to introduce Helen to Jackson's mother, Martha.
After returning to New York, Helen discovers she is pregnant. When she informs Jackson of this, he asks her to marry him and she accepts. The wedding is held at Kilronan, where Helen meets Jackson's paternal grandmother, Alice, who tells Helen she doesn't trust Martha.
After returning to New York apartment, Helen is assaulted by a man who steals her locket. When Helen says she's pregnant, he cuts her abdomen and leaves. The fetus was not injured.
Martha arrives and says she wants to sell Kilronan because she cannot run it alone. Helen tells Jackson she wants to move to Kentucky and in with Martha for a year and help renovate the land. Jackson tells Helen his father died in that house when he was seven and he blames himself because he ran into his father pushing him down the stairs. Jackson also tells Helen that his father had been cheating on Martha with Robin Hayes. Helen says they should go back so Jackson can face his "old ghosts".
The couple move in with Martha who attempts to divide the couple. Suspicious, Helen talks to Alice who tells her that Jackson is wrong about his father's death. The father landed on a nail puller at the bottom of the stairs, crushing his sternum, which, according to news reports was a freak accident.
Helen tells Jackson that Martha is tearing their marriage apart. He agrees to go back to New York and tells his mother.
That evening, Martha bakes a cake for Helen laced with pitocin, a labor inducer. Helen wakes up the next morning, feeling strange. She discovers a baby room set up by Martha and finds the locket that was stolen from her in New York. When Martha unexpectedly enters the room, Helen tries unsuccessfully to escape.
A:
What is the name of the person who blames himself for his father's death?