In this task, you're given an article and an answer. Your task is to generate the fill-in-the-blank question for this answer based on the given article. The blanks are always at the end of the question, and can be filled with more than one word or phrase.

Article: Blue whales are the largest animals ever known to have existed on the planet, and they can grow to a length of 100 feet and weigh more than 330,000 pounds. But recently researchers have found that these whales are on the move and they have migrated (moved) from California waters to areas off Canada and Alaska for the first time since commercial whaling ended in 1965. The researchers identified 15 blue whales that have appeared off the coast of British Columbia and the Gulf of Alaska since 1997. Four of these whales were recognized as ones that were once sighted off California shores, suggesting that the whales are returning to an old migration pattern between the coasts. Before commercial whaling began in the early 1900s, blue whales were found widely throughout the North Pacific and California waters. But from the 1920s to the 1960s, whaling severely reduced the whale populations. Blue whales never recovered in the Northern Pacific, making sightings in this area rare. However, much larger groups of whales have been observed close to California since the 1970s. The scientists had previously thought that the California population was separate from the population that had historically lived in North Pacific waters. But the current study shows that whales off the coast of British Columbia and the Gulf of Alaska are likely part of the California population.[:] To identify the blue whales, the researchers looked at photos of _ taken in the North Pacific Ocean and compared them with a library of blue whale pictures taken along the West Coast of the United States and Southern Pacific. Up to now, the researchers are not quite sure why the whales are changing their migration patterns, but they suspect that the whales may be following their food moving farther north by the changes in ocean conditions.
Answer: moving from the south to the north
According to the passage, blue whales are _ .

Article: There once was a very wealthy man who had made great achievement. He had more money than he could ever spend, and he was admired and looked up to by his neighbors. Still,he knew that something was missing in his life. He wasn't happy. All his life he had been striving for happiness, but he had never been able to find it. Then one day, he heard about a hidden temple in Nepal that had a special room that contained the secret of happiness. He immediately sold all that he owned and set out to find this hidden temple. After many years of searching and countless hardships he arrived there. He was tired and penniless, but he knew that none of that was important now because he had found the temple. He asked a wise, smiling monk if he could enter the special room. The monk agreed and showed him the stairs leading to the room. He climbed them with legs shaking with expectation and slowly opened the door. He stared into the room with sunlight streaming through the window and saw what he had come so far to find. There hanging on the wall was the secret of happiness. The man gazed at himself in the mirror and laughed. It is time that we all realized that we were the secret of our own happiness. Happiness is a choice that we can make. Don't spend the rest of your life searching the world for happiness then. Just look in the mirror and laugh. Just let the happiness flow from your heart, mind, and soul until it fills your life and the lives of all those around you.
Answer: found the secret of happiness at last
According to the text, the man_.

Article: A 13-year-old American boy on Saturday became the youngest climber to conquer Mount Everest, the world's highest mountain. Jordan Romero from Big Bear, California, climbed up the 8,850-meter summit from the Tibetan side. On the same day, a Nepali man, Apa Sherpa, broke his own world record of climbing Everest when he reached the summit for the twentieth time. Apa Shepa's team set off from Nepal's capital, Kathmandu, last month, heading for the base camp on the Chinese side of the mountain. "The team has just called in and believe that they are standing on top of Mt. Everest," Romero's blog said. "Their dreams have now come true. Everyone is happy." The climbing has put Romero one step closer to reaching his goal of climbing the highest mountains on all seven continents . "It is just a goal." Romero said. He had already climbed five peaks , and needs to climb only Vinson Massif, the highest peak in Antarctica, to hit his goal. The youngest person before to climb Everest was 16-year-old Temba Tsheri Sherpa of Nepal. Romero climbed together with a team including his father Paul and three local guides. He wanted to pick a small piece of rock from the top of the world and wear it in a necklace. While Nepal insists that anyone planning to climb Mount Everest must be at least 16, China does not have any age restrictions . Some mountain climbers haven't agreed with the Romero family for letting him try it but his father said the climbing from the Chinese side is less dangerous.
Answer: realize part of his goal
Jordan Romero climbed up Mount Everest mainly to _ .