Input: Child labour
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.

What was the youngest age of a child working in a factory?
Output: four

Input: Biodiversity
Interspecific crop diversity is, in part, responsible for offering variety in what we eat. Intraspecific diversity, the variety of alleles within a single species, also offers us choice in our diets. If a crop fails in a monoculture, we rely on agricultural diversity to replant the land with something new. If a wheat crop is destroyed by a pest we may plant a hardier variety of wheat the next year, relying on intraspecific diversity. We may forgo wheat production in that area and plant a different species altogether, relying on interspecific diversity. Even an agricultural society which primarily grows monocultures, relies on biodiversity at some point.

When do we rely on agricultural diversity to replant the land with something new?
Output: If a crop fails in a monoculture

Input: Wood
Heartwood is often visually distinct from the living sapwood, and can be distinguished in a cross-section where the boundary will tend to follow the growth rings. For example, it is sometimes much darker. However, other processes such as decay or insect invasion can also discolor wood, even in woody plants that do not form heartwood, which may lead to confusion.

In what part of a tree's cross-section is heartwood visible?
Output: growth rings

Input: Melbourne
Melbourne is also an important financial centre. Two of the big four banks, NAB and ANZ, are headquartered in Melbourne. The city has carved out a niche as Australia's leading centre for superannuation (pension) funds, with 40% of the total, and 65% of industry super-funds including the $109 billion-dollar Federal Government Future Fund. The city was rated 41st within the top 50 financial cities as surveyed by the MasterCard Worldwide Centers of Commerce Index (2008), second only to Sydney (12th) in Australia. Melbourne is Australia's second-largest industrial centre. It is the Australian base for a number of significant manufacturers including Boeing, truck-makers Kenworth and Iveco, Cadbury as well as Bombardier Transportation and Jayco, among many others. It is also home to a wide variety of other manufacturers, ranging from petrochemicals and pharmaceuticals to fashion garments, paper manufacturing and food processing. The south-eastern suburb of Scoresby is home to Nintendo's Australian headquarters. The city also boasts a research and development hub for Ford Australia, as well as a global design studio and technical centre for General Motors and Toyota respectively.

Which city is Australia's second-largest industrial centre?
Output:
Melbourne