Input: Article: The just-noticeable difference (jnd) (the threshold at which a change is perceived) depends on the tone's frequency content. Below 500 Hz, the jnd is about 3 Hz for sine waves, and 1 Hz for complex tones; above 1000 Hz, the jnd for sine waves is about 0.6% (about 10 cents). The jnd is typically tested by playing two tones in quick succession with the listener asked if there was a difference in their pitches. The jnd becomes smaller if the two tones are played simultaneously as the listener is then able to discern beat frequencies. The total number of perceptible pitch steps in the range of human hearing is about 1,400; the total number of notes in the equal-tempered scale, from 16 to 16,000 Hz, is 120.

Now answer this question: The just-noticeable difference, at which a change is perceived depends on what?

Output: the tone's frequency content


Article: For statistical purposes, the country is divided into three metropolitan areas: Tel Aviv metropolitan area (population 3,206,400), Haifa metropolitan area (population 1,021,000), and Beer Sheva metropolitan area (population 559,700). Israel's largest municipality, in population and area, is Jerusalem with 773,800 residents in an area of 126 square kilometres (49 sq mi) (in 2009). Israeli government statistics on Jerusalem include the population and area of East Jerusalem, which is widely recognized as part of the Palestinian territories under Israeli occupation. Tel Aviv, Haifa, and Rishon LeZion rank as Israel's next most populous cities, with populations of 393,900, 265,600, and 227,600 respectively.

Question: How many metropolitan areas are there?
Ans: three


Here is a question about this article: The scientific evidence is mixed as to whether companionship of a dog can enhance human physical health and psychological wellbeing. Studies suggesting that there are benefits to physical health and psychological wellbeing have been criticised for being poorly controlled, and finding that "[t]he health of elderly people is related to their health habits and social supports but not to their ownership of, or attachment to, a companion animal." Earlier studies have shown that people who keep pet dogs or cats exhibit better mental and physical health than those who do not, making fewer visits to the doctor and being less likely to be on medication than non-guardians.
What is the answer to this question: Studies that people are better off with dogs have been criticized for being what?
****
So... poorly controlled


The problem: Answer a question about this article:
From the 8th to the 10th century, three dynasties contested for control of northern India: the Gurjara Pratiharas of Malwa, the Palas of Bengal, and the Rashtrakutas of the Deccan. The Sena dynasty would later assume control of the Pala Empire, and the Gurjara Pratiharas fragmented into various states. These were the first of the Rajput states. The first recorded Rajput kingdoms emerged in Rajasthan in the 6th century, and small Rajput dynasties later ruled much of northern India. One Gurjar Rajput of the Chauhan clan, Prithvi Raj Chauhan, was known for bloody conflicts against the advancing Turkic sultanates. The Chola empire emerged as a major power during the reign of Raja Raja Chola I and Rajendra Chola I who successfully invaded parts of Southeast Asia and Sri Lanka in the 11th century. Lalitaditya Muktapida (r. 724 CE–760 CE) was an emperor of the Kashmiri Karkoṭa dynasty, which exercised influence in northwestern India from 625 CE until 1003, and was followed by Lohara dynasty. He is known primarily for his successful battles against the Muslim and Tibetan advances into Kashmiri-dominated regions. Kalhana in his Rajatarangini credits king Lalitaditya with leading an aggressive military campaign in Northern India and Central Asia. He broke into the Uttarapatha and defeated the rebellious tribes of the Kambojas, Tukharas (Turks in Turkmenistan and Tocharians in Badakhshan), Bhautas (Tibetans in Baltistan and Tibet) and Daradas (Dards). His campaign then led him to subjugate the kingdoms of Pragjyotisha, Strirajya and the Uttarakurus. The Shahi dynasty ruled portions of eastern Afghanistan, northern Pakistan, and Kashmir from the mid-7th century to the early 11th century.
What Rajput ruler was known for his conflicts with the Turkic sultanates?
****
The answer: Prithvi Raj Chauhan


Problem: Please answer a question about the following article about Gamal Abdel Nasser:
American political scientist Mark Cooper asserted that Nasser's charisma and his direct relationship with the Egyptian people "rendered intermediaries (organizations and individuals) unnecessary". He opined that Nasser's legacy was a "guarantee of instability" due to Nasser's reliance on personal power and the absence of strong political institutions under his rule. Historian Abd al-Azim Ramadan wrote that Nasser was an irrational and irresponsible leader, blaming his inclination to solitary decision-making for Egypt's losses during the Suez War, among other events. Miles Copeland, Jr. , once described as Nasser's closest Western adviser, said that the barriers between Nasser and the outside world have grown so thick that all but the information that attest to his infallibility, indispensability, and immortality has been filtered out.
Who called Nasser an irrational and irresponsible leader?
A: Abd al-Azim Ramadan


Question: Read this and answer the question

The rapid development of religions in Zhejiang has driven the local committee of ethnic and religious affairs to enact measures to rationalise them in 2014, variously named "Three Rectifications and One Demolition" operations or "Special Treatment Work on Illegally Constructed Sites of Religious and Folk Religion Activities" according to the locality. These regulations have led to cases of demolition of churches and folk religion temples, or the removal of crosses from churches' roofs and spires. An exemplary case was that of the Sanjiang Church.

What was an exemplary case of all this?
Answer:
Sanjiang Church