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.

[EX Q]: Serotonin is a neuromodulator involved in regulation of mood and behavior. Development in the limbic system plays an important role in determining rewards and punishments and processing emotional experience and social information. Changes in the levels of the neurotransmitters dopamine and serotonin in the limbic system make adolescents more emotional and more responsive to rewards and stress. The corresponding increase in emotional variability also can increase adolescents' vulnerability. The effect of serotonin is not limited to the limbic system: Several serotonin receptors have their gene expression change dramatically during adolescence, particularly in the human frontal and prefrontal cortex .
[EX A]: Which neuromodulator is involved in regulation of mood and behavior?

[EX Q]: From the years 1500 to 1850, an estimated 3.5 million captives were forcibly shipped from West/Central Africa to Brazil; the territory received the highest number of slaves of any country in the Americas. Scholars estimate that more than half of the Brazilian population is at least in part descended from these individuals. Brazil has the largest population of Afro-descendants outside of Africa. In contrast to the US, during the slavery period and after, the Portuguese colonial government and later Brazilian government did not pass formal anti-miscegenation or segregation laws. As in other Latin countries, intermarriage was prevalent during the colonial period and continued afterward. In addition, people of mixed race (pardo) often tended to marry white, and their descendants became accepted as white. As a result, some of the European descended population also has West African or Amerindian blood. According to the last census of the 20th century, in which Brazilians could choose from five color/ethnic categories with which they identified, 54% of individuals identified as white, 6.2% identified as black, and 39.5% identified as pardo (brown) a broad multi-racial category, including tri-racial persons.
[EX A]: How many slaves were shipped from Africa to Brazil between 1500 and 1850?

[EX Q]: Around 930 BCE, the kingdom split into a southern Kingdom of Judah and a northern Kingdom of Israel. From the middle of the 8th century BCE Israel came into increasing conflict with the expanding neo-Assyrian empire. Under Tiglath-Pileser III it first split Israel's territory into several smaller units and then destroyed its capital, Samaria (722 BCE). An Israelite revolt (724722 BCE) was crushed after the siege and capture of Samaria by the Assyrian king Sargon II. Sargon's son, Sennacherib, tried and failed to conquer Judah. Assyrian records say he leveled 46 walled cities and besieged Jerusalem, leaving after receiving extensive tribute.
[EX A]:
When did the kingdom split?