Input: Read this: 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.
Question: What is the name of the tube that helps add in animal digestion?

Output: gastrointestinal tract


Input: Read this: The second Diadochi war began following the death of Antipater in 319 BC. Passing over his own son, Cassander, Antipater had declared Polyperchon his successor as Regent. Cassander rose in revolt against Polyperchon (who was joined by Eumenes) and was supported by Antigonus, Lysimachus and Ptolemy. In 317, Cassander invaded Macedonia, attaining control of Macedon, sentencing Olympias to death and capturing the boy king Alexander IV, and his mother. In Asia, Eumenes was betrayed by his own men after years of campaign and was given up to Antigonus who had him executed.
Question: When did Antipater die?

Output: 319 BC


Input: Read this: Before the Hellenistic period, Greek colonies had been established on the coast of the Crimean and Taman peninsulas. The Bosporan Kingdom was a multi-ethnic kingdom of Greek city states and local tribal peoples such as the Maeotians, Thracians, Crimean Scythians and Cimmerians under the Spartocid dynasty (438–110 BCE). The Spartocids were a hellenized Thracian family from Panticapaeum. The Bosporans had long lasting trade contacts with the Scythian peoples of the Pontic-Caspian steppe, and Hellenistic influence can be seen in the Scythian settlements of the Crimea, such as in the Scythian Neapolis. Scythian pressure on the Bosporan kingdom under Paerisades V led to its eventual vassalage under the Pontic king Mithradates VI for protection, circa 107 BCE. It later became a Roman client state. Other Scythians on the steppes of Central Asia came into contact with Hellenistic culture through the Greeks of Bactria. Many Scythian elites purchased Greek products and some Scythian art shows Greek influences. At least some Scythians seem to have become Hellenized, because we know of conflicts between the elites of the Scythian kingdom over the adoption of Greek ways. These Hellenized Scythians were known as the "young Scythians". The peoples around Pontic Olbia, known as the Callipidae, were intermixed and Hellenized Greco-Scythians.
Question: From whom did the Scythians of Central Asia discover Hellenistic culture?

Output: Greeks of Bactria


Input: Read this: A lot of temples dedicated to Apollo were built in Greece and in the Greek colonies, and they show the spread of the cult of Apollo, and the evolution of the Greek architecture, which was mostly based on the rightness of form, and on mathematical relations. Some of the earliest temples, especially in Crete, don't belong to any Greek order. It seems that the first peripteral temples were rectangle wooden structures. The different wooden elements were considered divine, and their forms were preserved in the marble or stone elements of the temples of Doric order. The Greeks used standard types, because they believed that the world of objects was a series of typical forms which could be represented in several instances. The temples should be canonic, and the architects were trying to achieve the esthetic perfection. From the earliest times there were certain rules strictly observed in rectangular peripteral and prostyle buildings. The first buildings were narrow to hold the roof, and when the dimensions changed, some mathematical relations became necessary, in order to keep the original forms. This probably influenced the theory of numbers of Pythagoras, who believed that behind the appearance of things, there was the permanent principle of mathematics.
Question: Why were the first buildings narrow?

Output:
to hold the roof