Context: Meteorites from Antarctica are an important area of study of material formed early in the solar system; most are thought to come from asteroids, but some may have originated on larger planets. The first meteorite was found in 1912, and named the Adelie Land meteorite. In 1969, a Japanese expedition discovered nine meteorites. Most of these meteorites have fallen onto the ice sheet in the last million years. Motion of the ice sheet tends to concentrate the meteorites at blocking locations such as mountain ranges, with wind erosion bringing them to the surface after centuries beneath accumulated snowfall. Compared with meteorites collected in more temperate regions on Earth, the Antarctic meteorites are well-preserved.

Question: What astronomical study is important research for Antarctica?
Answer: Meteorites

Question: What is the supposed source of most Antarctica meteorites?
Answer: asteroids

Question: When was the first meteorite found in Antarctica?
Answer: 1912

Question: What expedition found nine meteorites in 1969?
Answer: Japanese

Question: What is it about Antarctic meteorites that is different form meteorites found in other places?
Answer: well-preserved.

Question: What was first found in 1921?
Answer: Unanswerable

Question: What was the name of the 1921 meteorite?
Answer: Unanswerable

Question: What happened in 1996?
Answer: Unanswerable

Question: How many meteorites did the 1996 Japanese expedition find?
Answer: Unanswerable