This task is about reading the given passage and construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) its answer is a continuous text span from the paragraph. Avoid creating questions that (i) can be answered correctly without actually understanding the paragraph and (ii) uses same words or phrases given in the passage.

Q: Prior Zelda games have employed a theme of two separate, yet connected, worlds. In A Link to the Past, Link travels between a "Light World" and a "Dark World"; in Ocarina of Time, as well as in Oracle of Ages, Link travels between two different time periods. The Zelda team sought to reuse this motif in the series' latest installment. It was suggested that Link transform into a wolf, much like he metamorphoses into a rabbit in the Dark World of A Link to the Past.[m] The story of the game was created by Aonuma, and later underwent several changes by scenario writers Mitsuhiro Takano and Aya Kyogoku. Takano created the script for the story scenes, while Kyogoku and Takayuki Ikkaku handled the actual in-game script. Aonuma left his team working on the new idea while he directed The Minish Cap for the Game Boy Advance. When he returned, he found the Twilight Princess team struggling. Emphasis on the parallel worlds and the wolf transformation had made Link's character unbelievable. Aonuma also felt the gameplay lacked the caliber of innovation found in Phantom Hourglass, which was being developed with touch controls for the Nintendo DS. At the same time, the Wii was under development with the code name "Revolution". Miyamoto thought that the Revolution's pointing device, the Wii Remote, was well suited for aiming arrows in Zelda, and suggested that Aonuma consider using it.[n]

A: What does Link morph into in A Link to the Past?
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Q: In coniferous or softwood species the wood cells are mostly of one kind, tracheids, and as a result the material is much more uniform in structure than that of most hardwoods. There are no vessels ("pores") in coniferous wood such as one sees so prominently in oak and ash, for example.

A: What type of cells makes up most wood cells in coniferous trees?
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Q: Northwestern was elected to the Association of American Universities in 1917 and remains a research university with "very high" research activity. Northwestern's schools of management, engineering, and communication are among the most academically productive in the nation. Northwestern received $550 million in research funding in 2014. Northwestern supports nearly 1,500 research laboratories across two campuses, predominately in the medical and biological sciences. Through the Innovation and New Ventures Office (INVO), Northwestern researchers disclosed 247 inventions, filed 270 patents applications, received 81 foreign and US patents, started 12 companies, and generated $79.8 million in licensing revenue in 2013. The bulk of revenue has come from a patent on pregabalin, a synthesized organic molecule discovered by chemistry professor Richard Silverman, which ultimately was marketed as Lyrica, a drug sold by Pfizer, to combat epilepsy, neuropathic pain, and fibromyalgia. INVO has been involved in creating a number of centers, including the Center for Developmental Therapeutics (CDT) and the Center for Device Development (CD2). It has also helped form over 50 Northwestern startup companies based on Northwestern technologies.

A:
When was Northwestern elected to the Association of American Universities?
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