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.
Example: Article: Homework can put you in a badmood , and that might actually be a good thing. Researchers from the University of Plymouth in England doubted whether mood might affect the way kids learn. To find out the answer, they did two experiments with children. The first experiment tested 30 kids. Someshapes were hidden inside a different, larger picture. The kids had to find the small shapes while sitting in a room with either cheerful or sad music playing in the background. To test their mood, the scientists asked the kids to point to one of five faces, from happy to sad. Children who listened to cheerful music tended to point to the smiley faces while the others pointed to the unhappy ones. The researchers found that sad kids took at least a second less to find the small shapes. They also found an average of three or four more shapes. In the second experiment, 61 children watched one of two scenes from a film. One scene was happy, and the other was sad. Just like in the first experiment, kids who saw the sad scene acted better compared to the others. The researchers guessed that feeling down makes people more likely to focus on a problem or difficult situation. Not all scientists agree with them, however. Other studies argued that maybe, that cheerful music in the first experiment distracted kids from finding shapes. While scientists work on finding out the answers, it still might be wise to choose when to do your tasks according to your mood. After eating a delicious ice cream, for example, write an essay.
Answer: whether mood affects their learning ability
Example solution: Researchers did experiments on kids in order to find out _ .
Example explanation: It is clearly mentioned in the article that to the check effect of mood on children is the main purpose of the experiment.

Problem: Article: Towards the end of Middle English, a sudden change in pronunciation started, with vowels being pronounced shorter and shorter. From the 16th century the British had contact with many people from around the world. This meant that lots of new vocabulary entered the language. The invention of printing also meant that there was now a common language in print. Books became cheaper and more people learned to read. Spelling and grammar became fixed, and the dialect of London became the standard. In 1604 the first English dictionary came out. Early Modern English and Late Modern English are mostly different in the number of words. Late Modern English has many more words, mainly because of the following two reasons: First, the Industrial Revolution led to the need for new words. Second, the British Empire covered one quarter of the earth's surface, and the English language took in foreign words from many countries. From around 1600, the English colonization of North America led to American English. Some English pronunciations and words " _ " when they reached America. In some ways, American English is more like the English of Shakespeare than modern British English. Some expressions that are called "American English" are in fact from British expressions. They were kept in the colonies while lost for a time in Britain. Spanish also had an influence on American English. For example, words like canyon, ranch, stampede and vigilante are from Spanish. They entered English by the people of Spain who settled in the American West. French words and West African words also influenced American English. Today, American English has a greater influence, because of the USA's movies, television, popular music, trade and technology.
Answer: vocabulary
Solution: The main difference between Early and Late Modern English lies in _ .