instruction:
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.
question:
The avian circulatory system is driven by a four-chambered, myogenic heart contained in a fibrous pericardial sac. This pericardial sac is filled with a serous fluid for lubrication. The heart itself is divided into a right and left half, each with an atrium and ventricle. The atrium and ventricles of each side are separated by atrioventricular valves which prevent back flow from one chamber to the next during contraction. Being myogenic, the heart's pace is maintained by pacemaker cells found in the sinoatrial node, located on the right atrium. The sinoatrial node uses calcium to cause a depolarizing signal transduction pathway from the atrium through right and left atrioventricular bundle which communicates contraction to the ventricles. The avian heart also consists of muscular arches that are made up of thick bundles of muscular layers. Much like a mammalian heart, the avian heart is composed of endocardial, myocardial and epicardial layers. The atrium walls tend to be thinner than the ventricle walls, due to the intense ventricular contraction used to pump oxygenated blood throughout the body. Avian hearts are generally larger than mammalian hearts when compared to body mass. This adaptation allows more blood to be pumped to meet the high metabolic need associated with flight.
answer:
The avian circulatory system is driven by what?


question:
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.
answer:
When did Antipater die?


question:
Albert Wendt is a significant Samoan writer whose novels and stories tell the Samoan experience. In 1989, his novel Flying Fox in a Freedom Tree was made into a feature film in New Zealand, directed by Martyn Sanderson. Another novel Sons for the Return Home had also been made into a feature film in 1979, directed by Paul Maunder. The late John Kneubuhl, born in American Samoa, was an accomplished playwright and screenwriter and writer. Sia Figiel won the 1997 Commonwealth Writers' Prize for fiction in the south-east Asia/South Pacific region with her novel "Where We Once Belonged". Momoe Von Reiche is an internationally recognised poet and artist. Tusiata Avia is a performance poet. Her first book of poetry Wild Dogs Under My Skirt was published by Victoria University Press in 2004. Dan Taulapapa McMullin is an artist and writer. Other Samoan poets and writers include Sapa'u Ruperake Petaia, Eti Sa'aga and Savea Sano Malifa, the editor of the Samoa Observer.
answer:

What Samoan author write Flying Fox in Freedom Tree?