instruction:
Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.
question:
Frederik Helstrup Jensen (born 16 March 1993) is a Danish footballer who plays for Helsingborgs IF of the Allsvenskan in Sweden.
answer:
What was the name of Frederik Helstrup's team?


question:
What could make Michael Jordon, one of the greatest basketball players in history, shed tears? It was when he became a member of the Basketball Hall of Fame on September 11. The hall is in Springfield, Massachusetts and honors the best basketball players, greatest coaches and other contributors to the game. "The game of basketball has been everything to me ," said Jordan, 46. "It is the place I have always gone when I needed to find comfort and peace." Jordan retired twice in his 15-year career, finishing with 32292 points, the third highest total points in NBA history behind Kareem Abdul-Jabbar and Karl Malone. His average of 30.12 points a game is the best in the League. "One day you might look up and see me playing the game at 50," Jordan said. "Because limits, like fears, are often just an illusion." In other words, it was motivation that made Jordan such a success.. A great career did not mean a smooth one. His high school coach cut him from the team in favor of a taller player when Jordan was in 10thgrade. His college coach wouldn't allow him on the cover of Sports Illustration in 1981 with North Carolina's four other players because Jordan was a freshman. In his first NBA All-Star game, older NBA stars wouldn't throw him the ball because of jealousy. "That burned me up," Jordan said. "But _ don't have to stop you. If you run into a wall, don't turn around and give up. Figure out how to climb it, go through it, or work around it."
answer:
Who scored the highest total points in NBA history?


question:
The evolutionarily conserved histone variant H2A.Z has an important role in the regulation of gene expression and the establishment of a buffer to the spread of silent heterochromatin. Saccharomyces cerevisiae Swr1, a Swi2/Snf2-related ATPase, is the catalytic core of a multisubunit chromatin remodeling enzyme, called the SWR1 complex, that efficiently replaces conventional histone H2A in nucleosomes with histone H2A.Z. Swr1 is required for the deposition of histone H2A.Z at stereotypical promoter locations in vivo, and Swr1 and H2A.Z commonly regulate a subset of yeast genes. Here, we describe an integrated nucleosome assembly-histone replacement system whereby histone exchange by chromatin remodeling activities may be analyzed in vitro. The system demonstrates ATP- and SWR1-complex-dependent replacement of histone H2A for histone H2A.Z on a preassembled nucleosome array. This system may also be adapted to analyze dynamic interactions between chromatin remodeling and modifying enzymes, histone chaperones, and nucleosome substrates containing canonical, variant, or covalently modified histones.
answer:

Which protein mediates the replacement of H2A by H2A.Z in the yeast Saccharomyces cerevisiae?