Context: Several governments maintain permanent manned research stations on the continent. The number of people conducting and supporting scientific research and other work on the continent and its nearby islands varies from about 1,000 in winter to about 5,000 in the summer, giving it a population density between 70 and 350 inhabitants per million square kilometres (180 and 900 per million square miles) at these times. Many of the stations are staffed year-round, the winter-over personnel typically arriving from their home countries for a one-year assignment. An Orthodox church—Trinity Church, opened in 2004 at the Russian Bellingshausen Station—is manned year-round by one or two priests, who are similarly rotated every year.

Question: Who has research stations in Antarctica?
Answer: Several governments

Question: What is the span of population density per million square kilometers of researchers in Antarctica?
Answer: between 70 and 350

Question: About long long do researchers stay when researching in Antarctica?
Answer: one-year

Question: What station has an Orthodox church representative?
Answer: Bellingshausen Station

Question: When did the Trinity Church begin its posting at Bellinshausen station?
Answer: 2004

Question: Who maintains perminent settlements on the continent?
Answer: Unanswerable

Question: What Antartcic Church closed in 2004?
Answer: Unanswerable

Question: Where are there 5,000 year round residents?
Answer: Unanswerable

Question: How many people are conducting research on nearby islands in the winter?
Answer: Unanswerable

Question: How many people are conducting research on nearby islands in the summer?
Answer: Unanswerable

Question: What is the population density of the surrounding islands?
Answer: Unanswerable

Question: What year did Trinity Orthodox open?
Answer: Unanswerable

Question: What station opened Trinity Orthodox?
Answer: Unanswerable