This task is about creating an unanswerable question based on a given passage. Construct a question that looks relevant to the given context but is unanswerable. Following are a few suggestions about how to create unanswerable questions:
(i) create questions which require satisfying a constraint that is not mentioned in the passage
(ii) create questions which require information beyond what is provided in the passage in order to answer
(iii) replace an existing entity, number, date mentioned in the passage with other entity, number, date and use it in the question
(iv) create a question which is answerable from the passage and then replace one or two words by their antonyms or insert/remove negation words to make it unanswerable.
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Question: Passage: New chemical glass compositions or new treatment techniques can be initially investigated in small-scale laboratory experiments. The raw materials for laboratory-scale glass melts are often different from those used in mass production because the cost factor has a low priority. In the laboratory mostly pure chemicals are used. Care must be taken that the raw materials have not reacted with moisture or other chemicals in the environment (such as alkali or alkaline earth metal oxides and hydroxides, or boron oxide), or that the impurities are quantified (loss on ignition). Evaporation losses during glass melting should be considered during the selection of the raw materials, e.g., sodium selenite may be preferred over easily evaporating SeO2. Also, more readily reacting raw materials may be preferred over relatively inert ones, such as Al(OH)3 over Al2O3. Usually, the melts are carried out in platinum crucibles to reduce contamination from the crucible material. Glass homogeneity is achieved by homogenizing the raw materials mixture (glass batch), by stirring the melt, and by crushing and re-melting the first melt. The obtained glass is usually annealed to prevent breakage during processing.

Answer: What meterial is useful in glassmaking because of its hydroxides?


Question: Passage: The Quran consists of 114 chapters of varying lengths, each known as a sura. Suras are classified as Meccan or Medinan, depending on whether the verses were revealed before or after the migration of Muhammad to the city of Medina. However, a sura classified as Medinan may contain Meccan verses in it and vice versa. Sura titles are derived from a name or quality discussed in the text, or from the first letters or words of the sura. Suras are arranged roughly in order of decreasing size. The sura arrangement is thus not connected to the sequence of revelation. Each sura except the ninth starts with the Bismillah (بسم الله الرحمن الرحيم), an Arabic phrase meaning "In the name of God". There are, however, still 114 occurrences of the Bismillah in the Quran, due to its presence in Quran 27:30 as the opening of Solomon's letter to the Queen of Sheba.

Answer: What is a chapter of the Quran not called?


Question: Passage: In the mid-1990s, Dell expanded beyond desktop computers and laptops by selling servers, starting with low-end servers. The major three providers of servers at the time were IBM, Hewlett Packard, and Compaq, many of which were based on proprietary technology, such as IBM's Power4 microprocessors or various proprietary versions of the Unix operating system. Dell's new PowerEdge servers did not require a major investment in proprietary technologies, as they ran Microsoft Windows NT on Intel chips, and could be built cheaper than its competitors. Consequently, Dell's enterprise revenues, almost nonexistent in 1994, accounted for 13 percent of the company's total intake by 1998. Three years later, Dell passed Compaq as the top provider of Intel-based servers, with 31 percent of the market. Dell's first acquisition occurred in 1999 with the purchase of ConvergeNet Technologies for $332 million, after Dell had failed to develop an enterprise storage system in-house; ConvergeNet's elegant but complex technology did not fit in with Dell's commodity-producer business model, forcing Dell to write down the entire value of the acquisition.

Answer:
What decade did Dell begin to buy things other than PCs?