Problem: Please answer a question about the following article about Digestion:
Digestive systems take many forms. There is a fundamental distinction between internal and external digestion. External digestion developed earlier in evolutionary history, and most fungi still rely on it. In this process, enzymes are secreted into the environment surrounding the organism, where they break down an organic material, and some of the products diffuse back to the organism. Animals have a tube (gastrointestinal tract) in which internal digestion occurs, which is more efficient because more of the broken down products can be captured, and the internal chemical environment can be more efficiently controlled.
When did external digestion develop?
A: earlier in evolutionary history

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Prior to the crisis, financial institutions became highly leveraged, increasing their appetite for risky investments and reducing their resilience in case of losses. Much of this leverage was achieved using complex financial instruments such as off-balance sheet securitization and derivatives, which made it difficult for creditors and regulators to monitor and try to reduce financial institution risk levels. These instruments also made it virtually impossible to reorganize financial institutions in bankruptcy, and contributed to the need for government bailouts.

What type financial instruments are off-balance sheet securitization and derivatives?
Answer: complex

Problem: The Soviet answer on 4 May admonished Tito and the Communist Party of Yugoslavia (CPY) for failing to admit and correct its mistakes, and went on to accuse them of being too proud of their successes against the Germans, maintaining that the Red Army had saved them from destruction. Tito's response on 17 May suggested that the matter be settled at the meeting of the Cominform to be held that June. However, Tito did not attend the second meeting of the Cominform, fearing that Yugoslavia was to be openly attacked. In 1949 the crisis nearly escalated into an armed conflict, as Hungarian and Soviet forces were massing on the northern Yugoslav frontier. On 28 June, the other member countries expelled Yugoslavia, citing "nationalist elements" that had "managed in the course of the past five or six months to reach a dominant position in the leadership" of the CPY. The assumption in Moscow was that once it was known that he had lost Soviet approval, Tito would collapse; 'I will shake my little finger and there will be no more Tito,' Stalin remarked. The expulsion effectively banished Yugoslavia from the international association of socialist states, while other socialist states of Eastern Europe subsequently underwent purges of alleged "Titoists". Stalin took the matter personally and arranged several assassination attempts on Tito, none of which succeeded. In a correspondence between the two leaders, Tito openly wrote:
Tito did not attend the second meeting of this.
The answer is the following: Cominform

The strongest contribution of the French Academies to the public sphere comes from the concours academiques (roughly translated as 'academic contests') they sponsored throughout France. These academic contests were perhaps the most public of any institution during the Enlightenment. The practice of contests dated back to the Middle Ages, and was revived in the mid-17th century. The subject matter had previously been generally religious and/or monarchical, featuring essays, poetry, and painting. By roughly 1725, however, this subject matter had radically expanded and diversified, including "royal propaganda, philosophical battles, and critical ruminations on the social and political institutions of the Old Regime." Topics of public controversy were also discussed such as the theories of Newton and Descartes, the slave trade, women's education, and justice in France.
Which topics of public controversy became more widely discussed around 1725?
theories of Newton and Descartes, the slave trade, women's education, and justice

Input: Sichuan
The rulers of the expansionist Qin dynasty, based in present-day Gansu and Shaanxi, were only the first strategists to realize that the area's military importance matched its commercial and agricultural significance. The Sichuan basin is surrounded by the Himalayas to the west, the Qin Mountains to the north, and mountainous areas of Yunnan to the south. Since the Yangtze flows through the basin and then through the perilous Yangzi Gorges to eastern and southern China, Sichuan was a staging area for amphibious military forces and a refuge for political refugees.[citation needed]

What river flows through the Sichuan basin?
Output: Yangtze

Problem: Please answer a question about the following article about Boston:
Air quality in Boston is generally very good: during the ten-year period 20042013, there were only 4 days in which the air was unhealthy for the general public, according to the EPA.
How many days between 2004 and 2013 was the air unhealthy?
A:
4 days