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.
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Question: Passage: In the late 19th and early 20th centuries, child vaudevillian Buster Keaton stays in boarding houses, rides in train boxcars, and performs with his mother and father in a knock-about (physical comedy) act called The Three Keatons. As a young man Keaton travels on his own to Hollywood and tricks his way onto the grounds of silent-film studio Famous Studio as a workman carrying a board, as in one of his trademark comic bits. 
Sneaking onto a set, he attracts the attention of a young casting director, Gloria Brent. He demonstrates his type of physical comedy to a director Kurt Bergner, whom he does not impress. But Gloria recognizes his talent and recommends him to studio head Larry Winters, who offers him a contract. Keaton begins to get small parts in other people's pictures. As his comic talent becomes more apparent and his fame and money-making power grows, he is offered a contract to direct and star in his own silent films.
Dissatisfied with not sharing the profits of his films, he is told that he must invest in his own pictures in order to profit-share. He does in "The Gambler", which is released at the same time as Al Jolson's blockbuster talkie, "The Jazz Singer", reducing public interest in it. Buster struggles to adapt to performing in talking pictures.

Answer: What is the full name of the person who fails to impress Kurt Bergner?


Question: Passage: Going west where gold is being found, Jan Morell and wife Mary meet in the Napa, California, valley with his prospector brother Frank, but soon hired gunmen Jack Welch and Hank Purvis steal the gold they have panned and kill Mary.
In town, Frank is killed, as well, and Jan seriously wounded. He is cared for by Felipe de Ortega and sister Elena, who explain that Welch and Purvis work for dishonest Mayor Thomas Ainsworth, who also stole the Ortega family's land and property. An approval of statehood for California could restore law and order, as well as citizens' rights.
Elena fears for their safety, but Jan joins forces with Felipe's men to create havoc in Ainsworth's life, rustling horses and stealing money. A new U.S. marshal, Henderson, places a $5,000 reward on him, but Jan nevertheless captures Purvis and threatens to lynch him if he does not confess to Ainsworth's misdeeds. Elizabeth Ainsworth now begins to understand her father's corrupt ways.
As the gunfighting intensifies, both Welch and Felipe are killed. Jan is arrested and faces the hangman, but Henderson believes in his innocence and is able to release him when statehood wins approval and a general amnesty is granted. Jan and Elena plan a new life together.

Answer: What is the first name of the person who hired someone to kill Mary?


Question: Passage: In April 1967, the office of Marvin Kramer, a Jewish civil rights lawyer in Indianola, Mississippi, is bombed by the Ku Klux Klan, killing Kramer's five-year-old twin boys and leading to the amputation of Kramer's legs and his later suicide.  Klansman Sam Cayhall is tried for murder in the bombing, and is eventually convicted and sentenced to die in the gas chamber at the Mississippi State Penitentiary.  Twenty-nine years later, in 1996, Adam Hall, a young attorney at the Chicago law firm of Kravitz and Bane, seeks assignment to the firm's pro bono representation of Cayhall in the last weeks before his scheduled execution.  Adam is Sam Cayhall's grandson, his family having since moved away from the South and changed their name, haunted and shamed by Cayhall's crime.  Adam is motivated to take the case in a search for some understanding of the dark secrets of his family, which prompted the suicide of Adam's father the year Sam was sentenced to death (and whose body Adam found as a child).

Answer:
What's the full name of the man found guilty of killing the Jewish lawyer's children?