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

Input: Consider Input: In the 1950s, a family that owned a farm near Beulah, Michigan kept a bull chained to an elm . The bull paced around the tree, dragging the heavy iron chain, which led to a groove in the bark . The groove deepened over the years. Though for whatever reason, it did not kill the tree. After some years, the family took their bull away. They cut the chain, leaving the loop around the tree and one link hanging down. Then one year, agricultural disaster struck Michigan in the form of Dutch Elm Disease. All of the elms lining the road leading to the farm became infected and died. Everyone thought that the old elm would be the next. The farm owners considered doing the safe thing: pulling it out and cutting it up into firewood before it died. But they simply could not bring themselves to do it. It was as if the old tree had become a family friend. So they decided to let nature take its course. Amazingly, the tree did not die. Nobody could understand why it was the only elm still standing in the county! Plant experts from Michigan State University came out to observe the tree. They observed the scar left by the iron chain, now almost completely covered by bark. The experts decided that it was the chain that saved the elm's life. They reasoned that the tree must have absorbed so much iron from the chain that it became immune to the virus. It's said that what doesn't kill you will make you stronger. Or, as Earnest Hemingway put it, "Life breaks us all, but afterwards, many of us are strongest at the broken places."

Output: What actually saved the elm?

Input: Consider Input: 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.

Output: What did Mr.Belser teach Jack when he aws young?

Input: Consider Input: Fulk Basset (died 4 May 1271) was archbishop of Dublin, and was the elder brother of John de Sandford who was also archbishop at one time.
Output: Who was the brother of Fulk Basset?