question: In which month does this major tennis tournament take place, which was once called Australasian Championships?
answer: January
context: Title: Australian Open
  Passage: The Australian Open is a major tennis tournament held annually over the last fortnight of January in Melbourne, Australia.  First held in 1905, the tournament is chronologically the first of the four Grand Slam tennis events of the year – the other three being the French Open, Wimbledon and the US Open.  It features men's and women's singles; men's, women's and mixed doubles and junior's championships; as well as wheelchair, legends and exhibition events.  Prior to 1988 the tournament had been played on grass courts, but since then two types of hardcourt surfaces have been used at Melbourne Park – green coloured Rebound Ace up to 2007 and, afterwards, blue Plexicushion.
  Title: 1922 Australasian Championships
  Passage: The 1922 Australasian Championships was a tennis tournament that took place on outdoor Grass courts at the White City Tennis Club, Sydney, Australia from 2 December to 9 December.  It was the 15th edition of the Australian Championships (now known as the Australian Open), the third held in Sydney, and the third Grand Slam tournament of the year.  It was the inaugural year for the women's singles, women's doubles and mixed doubles competitions.  The singles titles were won by Australians James Anderson and Margaret Molesworth.
  Title: 1908 Australasian Championships
  Passage: The 1908 Australasian Championships was a tennis tournament that took place on outdoor grass courts in Sydney, Australia.  The preliminary rounds were played at the Sydney Cricket Ground while the final took place on the Double Bay Grounds.  It was the fourth edition of the Australasian Championships (now known as the Australian Open), the first held in Sydney and the third Grand Slam tournament of the year.  It consisted of a men's singles and doubles event.  Fred Alexander won the singles event and became the first non-Australasian to win the title.
  Title: 1905 Australasian Championships
  Passage: The 1905 Australasian Championships was a tennis tournament played on Grass courts in Melbourne, Australia at Warehouseman's Cricket Ground.  The tournament took place from 17 November through 27 November 1905.  It was the inaugural edition of the Australasian Championships and consisted of a men's singles and men's doubles competition.  The men's singles event had a field of 17 players and was won by Australian Rodney Heath.
citations: Australian Open 1922 Australasian Championships