Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.

[Q]: One day, a slave owner entered a local store and threatened a young boy who was his slave. At first, the slave refused to move and ran for the door. The slave owner reached for a heavy weight. He threw it at his slave. Instead, it hit Harriet on the head. Harriet almost died. For the rest of her life, she carried the mark of a deep wound on her head. Miser Brodas felt he never needed Harriet. He decided to sell her. Harriet thought of a way to prevent this. Each time she was shown to someone who might buy her, she acted as if she were falling asleep. After a while, Mister Brodas gave up the hope of selling Harriet. He sent her back to the fields. At 24 she married a free black man, John Tubman. By then, Harriet was sure she should escape. In 1849, Mister Brodas died. His slaves probably would be sold to further South. John Tubman tried to make Harriet forget about running away. Harriet decided she must end her marriage and that she needed to tell her family that she was leaving. Harriet escaped for Pennsylvania where slavery was banned there. Once she hid under hay that had been cut from the fields. Another time, she wore men's clothing. Finally, she arrived in Pennsylvania. Now that Harriet was free, she didn't forget other slaves in Maryland. During the next ten years, she freed her parents and other family members. She traveled back and forth eighteen times, helping about 300 slaves escape. She became an expert at hiding from slave hunters. At one time, anyone finding Harriet was promised 40,000dollars for catching her--dead or alive. The people she helped called her Moses. She had rescued them from slavery just as the biblical Moses rescued the Jews. After the Civil War began, Harriet started to spy for the North. She also served as a nurse. After four years of bloody fighting, the North won the war. Abraham Lincoln freed the slaves in 1863. There was no longer any need for Harriet to be Moses.
[A]: We know from the passage that Harriet was Mister Brodas' .

[Q]: Ashley and Chris work in the same department designing postcards. Chris had a college degree in art and deeply felt that the degree of his designs was excellent. His last postcard showed the depth of a desert's beauty and delights. "It's just a picture of the desert," Ashley said. "Not deep at all." "Some people desire seeing beauty," Chris replied. "Mine delivers that". Ashley laughed and said, "well, that depends on what you think beauty is." Days later, someone delivered a letter to Ashley. The letter said, "You are worthy of the bad things that will come your way. You will know the taste of defeat, and I will destroy you." Ashley suddenly felt very cold. It was as if the room temperature had dropped 30 degrees. "Who would do such a shocking deed?" she wondered. "I will not let a simple letter defeat me." Just then, Chris came into the room and offered Ashley a piece of his sandwich. "Try some," he smiled widely. "It's delicious." "Are you trying to poison me?" Ashley asked. Chris's answer was delayed from confusion. "What's your problem?" he asked. The next day, Ashley brought a bat to use to defend herself. When Chris saw her bat, he joked, "Defend and win one for the team." Ashley took no notice of him. She spent the whole day reading self-defending books and placed her work on delay. "You can't delay your work. Our job demands us to do our work on time," Chris said. "We must meet the demands of our job." "You're not the boss," Ashley replied. "Don't make demands of me." Because Ashley failed to do her work, she was fired. Chris glanced at Ashley's empty desk and smiled.
[A]: What kind of work did Chris and Ashley do?

[Q]: Peroxiredoxin-2 (PRDX-2) is an antioxidant and chaperone-like protein critical for cell function. This study examined whether the levels of lymphocyte PRDX-2 are altered over 1 month following ultra-endurance exercise. Nine middle-aged men undertook a single-stage, multi-day 233 km (145 mile) ultra-endurance running race. Blood was collected immediately before (Pre), upon completion/retirement (Post), and following the race at Day 1, Day 7 and Day 28. Lymphocyte lysates were examined for PRDX-2 by reducing and non-reducing SDS-PAGE with western blotting. In a sub-group of men who completed the race (n = 4), PRDX-2 oligomeric state (indicative of redox status) was investigated. Ultra-endurance exercise caused significant changes in lymphocyte PRDX-2 (F(4,32) 3.409, p = 0.020, (2) = 0.299): 7 days after the race, PRDX-2 levels in lymphocytes had fallen to 30% of pre-race values (p = 0.013) and returned to near-normal levels at Day 28. Non-reducing gels demonstrated that dimeric PRDX-2 (intracellular reduced PRDX-2 monomers) was increased in three of four race completers immediately post-race, indicative of an 'antioxidant response'. Moreover, monomeric PRDX-2 was also increased immediately post-race in two of four race-completing subjects, indicative of oxidative damage, which was not detectable by Day 7. Lymphocyte PRDX-2 was decreased below normal levels 7 days after ultra-endurance exercise. Excessive accumulation of reactive oxygen species induced by ultra-endurance exercise may underlie depletion of lymphocyte PRDX-2 by triggering its turnover after oxidation. Low levels of lymphocyte PRDX-2 could influence cell function and might, in part, explain reports of dysregulated immunity following ultra-endurance exercise.
[A]:
What type of enzyme is peroxiredoxin 2 (PRDX2)?