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

Q: It had been some time since Jack had seen the old man.Over the phone ,his mother told him,"Mr.Belser died last night ,The funeral is Wednesday."Memories flashed through his mind like an old newsreel as he sat quietly remembering his childhood days. When Jack was very young ,his father died.Mr Belser,who lived in the same neighborhood with them,spent as much time as he could to make sure Jack had a man's influence in his life.He spent a lot of time teachimg Jack he thought what was important in his following life.If Mr.Belser hadn' taught him how to weave,he wouldn't be in this business now.So he promised his mother he would attend Mr.Belser's funeral. "You'd better not drive your car.It's a long way."his mother warned him. Busy as he was,he kept his word.Though tired from the earliest flight,Jack tried his best to help.Mr.Belser's funeral was small because he had no children of his own and most of his s had passed away. The night before he had to return home,Jack and his mother stopped by to see the old house Mr.Belser once lived.Now it belonged to him.He bought the house from one of his s. The house was exactly as he remembered.Every step held memories.Every picture,every piece of furniture... Jadk stopped suddenly. The box on his desk was gone!He once asked the old man what was inside.He just smiled and said it was the most valuable thing to him,though it almost cost nothing to others.He figured that someone from the Belser family had taken it ."I will never know what was so valuable to him."Jack thought disappotntedly. Three days later returning home from work,Jack discovered a small package in his mailbox. The handwriting was difficult to read,but the return address caught his attention."Mr.Harold Belser"it read. Jack couldn't wait to open it .Inside lay the familiar small box.His heart racing,Jack unlocked the box.Inside he found a gold pocket watch with these words engraved:"Jack,Thanks for your time!Harold Belser." "The thing he valued most was my time."Jack held the watch before his chest,tears filling his eyes.

A: What did Mr.Belser teach Jack when he aws young?
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Q: The Rams started their season on the road against the Lions. The Rams drew first blood in the first quarter with a 48-yard field goal from Greg Zuerlein to take a 3-0 lead for the only score of that quarter. The Lions then took a 7-3 lead with Joique Bell's 1-yard run for a touchdown in the 2nd quarter. The Rams responded with a 29-yard field goal from Zuerlein as they came up within a point 7-6 before on the Lions' next possession, Matthew Stafford was picked off by Cortland Finnegan and it was returned 31 yards for a touchdown as the Rams retook the lead 13-7. The Lions then responded with Jason Hanson kicking a 41-yard field goal to shorten the Rams' lead to 13-10 at halftime. After the break, the Lions scored first with Jason Hanson kicking a 45-yard field goal to tie the game 13-13 for the only score of the 3rd quarter. However, the Rams moved back into the lead in the 4th quarter with Brandon Gibson's 23-yard catch from Sam Bradford to make it 20-13. The Lions tied the game back up with Kevin Smith running for a touchdown from 5 yards out to tie the game 20-20. The Rams then retook the lead with Greg Zuerlein kicking a 46-yard field goal to make the score 23-20. On their last possession, the Lions moved down the field and Matthew Stafford found Kevin Smith on a 5-yard touchdown pass to make the final score 27-23 as the Rams began their season 0-1.

A: Who kicked the longest field goal in the last quarter?
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Q: The two major virulence factors of Bacillus anthracis are the tripartite toxin and the polyglutamate capsule, which are encoded by genes on the large plasmids, pXO1 and pXO2, respectively. The genes atxA, located on pXO1, and acpA, located on pXO2, encode positive trans-acting proteins that are involved in bicarbonate-mediated regulation of toxin and capsule production, respectively. A derivative strain cured of pXO1 produced less capsular substance than the parent strain harbouring both pXO1 and pXO2, and electroporation of the strain cured of pXO1 with a plasmid containing the cloned atxA gene resulted in an increased level of capsule production. An acpA-null mutant was complemented by not only acpA but also the atxA gene. The cap region, which is essential for encapsulation, contains three genes capB, capC, and capA, arranged in that order. The atxA gene stimulated capsule synthesis from the cloned cap region. Transcriptional analysis of cap by RNA slot-blot hybridization and primer-extension analysis revealed that atxA activated expression of cap in trans at the transcriptional level. These results indicate that cross-talk occurs, in which the pXO1-located gene, atxA, activates transcription of the cap region genes located on pXO2. We identified two major apparent transcriptional start sites, designated P1 and P2, located at positions 731 bp and 625 bp, respectively, upstream of the translation-initiation codon of capB. Transcription initiated from P1 and P2 was activated by both atxA and acpA, and activation appeared to be stimulated by bicarbonate. Deletion analysis of the upstream region of the cap promoter revealed that activation by both atxA and acpA required a DNA segment of 70 bp extending upstream of the P1 site. These results suggest that cross-talk by atxA to the genes encoding capsule synthesis is caused by the interaction of the atxA gene product with a regulatory sequence upstream of cap.

A:
Which metabolite activates AtxA?
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