Input: Read this: The Victorian era in particular became notorious for the conditions under which children were employed. Children as young as four were employed in production factories and mines working long hours in dangerous, often fatal, working conditions. In coal mines, children would crawl through tunnels too narrow and low for adults. Children also worked as errand boys, crossing sweepers, shoe blacks, or selling matches, flowers and other cheap goods. Some children undertook work as apprentices to respectable trades, such as building or as domestic servants (there were over 120,000 domestic servants in London in the mid-18th century). Working hours were long: builders worked 64 hours a week in summer and 52 in winter, while domestic servants worked 80 hour weeks.
Question: Mid-18th century London had how many domestic servants?

Output: over 120,000


Input: Read this: Most cotton in the United States, Europe and Australia is harvested mechanically, either by a cotton picker, a machine that removes the cotton from the boll without damaging the cotton plant, or by a cotton stripper, which strips the entire boll off the plant. Cotton strippers are used in regions where it is too windy to grow picker varieties of cotton, and usually after application of a chemical defoliant or the natural defoliation that occurs after a freeze. Cotton is a perennial crop in the tropics, and without defoliation or freezing, the plant will continue to grow.
Question: How are most plants harvested?

Output: unanswerable


Input: Read this: After 1965, differences between the Hot 100 chart and the Easy Listening chart became more pronounced. Better reflecting what middle of the road stations were actually playing, the composition of the chart changed dramatically. As rock music continued to harden, there was much less crossover between the Hot 100 and Easy Listening chart than there had been in the early half of the 1960s. Roger Miller, Barbra Streisand and Bobby Vinton were among the chart's most popular performers.
Question: Along with Roger Miller and Barbra Streisand, who was a successful Easy Listening artist in this era?

Output: Bobby Vinton


Input: Read this: The principles of phonological analysis can be applied independently of modality because they are designed to serve as general analytical tools, not language-specific ones. The same principles have been applied to the analysis of sign languages (see Phonemes in sign languages), even though the sub-lexical units are not instantiated as speech sounds.
Question: In sign laguages what are not represented as instances of analytical tools?

Output:
unanswerable