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.

[Q]: Article: At night, bats fly through the air, catching hundreds of insects and other small animals. But during the day, they hardly move at all. Instead, bats pass the time hanging upside down from a secret spot. There are a couple of reasons why bats rest this way. First of all, it puts them in a position for takeoff. Unlike birds, bats can't fly into the air from the ground. Their wings don't produce enough lift to take off from a dead stop, and their hind legs are so small and underdeveloped that they can't run to build up the necessary takeoff speed. Instead, they use their front claws to climb to a high spot, and then fall into flight. During the hours when most enemies are active, bats gather where few animals would think to look and most can't reach. This allows them to disappear from the world until night comes again. There's also little competition for these resting spots, as other flying animals don't have the ability to hang upside down. Bats have a unique physiological adaptation that lets them hang around this way without using any energy. For you to hold your fist around an object tight, you contract  several muscles in your arm, which are connected to your fingers by tendons ;as one muscle contracts, it pulls a tendon, which pulls one of your fingers closed. A bat's talons  close in the same way, except that their tendons are connected only to the upper body, not to a muscle. To hang upside down, a bat pulls its claws open with other muscles. To get the talons to take hold of the surface, the bat simply lets its body relax. The weight of the upper body pulls down on the tendons connected to the talons, causing them to hold tight. Therefore, the bat doesn't have to do anything to hang upside down. 
 Answer: they can't start to fly from the ground directly
[A]: Bats hang upside down because  _  .


[Q]: Article: Like the Five Olympic Rings from which they draw their color and inspiration, the Five Friendlies will serve as the Official Mascots of Beijing 2008 Olympic Games, carrying a message of friendship and peace and blessings from China to children all over the world. Designed to express the playful qualities of five little children who form an intimate circle of friends, the Five Friendlies also embody the natural characteristics of four of China's most popular animals--the Fish, the Panda, the Tibetan Antelope, the Swallow--and the Olympic Flame. Each of the Friendlies has a rhyming two-syllable name--a traditional way of expressing affection for children in China. Beibei is the Fish, Jingjing is the Panda, Huanhuan is the Olympic Flame, Yingying is the Tibetan Antelope and Nini is the Swallow. When you put their names together--Bei Jing Huan Ying Ni--they say "Welcome to Beijing," offering a warm invitation that reflects the mission of the Five Friendlies as young ambassadors for the Olympic Games. The Five Friendlies also embody both the landscape and the dreams and aspirations of people from every part of the vast country of China. In their origins and their headpieces, you can see the five elements of nature--the sea, forest, fire, earth and sky--all stylistic rendered in ways that represent the deep traditional influences of Chinese folk art and ornamentation. 
 Answer: blessing
[A]: The Official Mascots of Beijing 2008 Olympic Games carry the following messages EXCEPT    _    .


[Q]: Article: Hadrian's Wall Hadrian's Wall was built, beginning in 122 AD, to keep Roman Britain safe from attacks from the Picts. The wall, starting from the North Sea to the Irish Sea (from the Tyne to the Solway), is about 73 miles long, 10 feet wide, and 15 feet high. In addition to the wall, the Romans built a system of small forts  housing up to 60 men every Roman mile along its whole length, with e towers very 1/3 Roman mile. 16 larger forts holding from 500 to 1000 soldiers were built into the wall, with large gates on the north face. Israeli West Bank barrier The Israeli West Bank barrier is a barrier under construction by the State of Israel along and within the West Bank. Upon completion, the barrier's total length will be nearly 700 kilometers. The barrier is built mainly in the West Bank. The Berlin Wall The Berlin Wall was the physical boundary between West Germany and East Germany. The Berlin Wall was built in the dead of night in 1961 and for 28 years kept East Germans from escaping to the West. Its destruction (in 1989) was celebrated around the world. Conwy's Town Walls Conwy's Town Walls are an ancient defensive   project around the town of Conwy in North Wales. The walls were built between 1283 and 1287. They are 1.3 kilometers long and include 21 towers and three gate houses. The project was completed by large quantities of workers and cost around PS15,000. Today the walls form part of the UNESCO world heritage site . 
 Answer: has 16 larger forts built into it
[A]:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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We know from the passage that Hadrian's Wall  _  .


