In this task, you are given a news article. Your task is to classify the article to one out of the four topics 'World', 'Sports', 'Business', 'Sci/Tech' if the article's main topic is relevant to the world, sports, business, and science/technology, correspondingly. If you are not sure about the topic, choose the closest option. Note that URLs in the text have been replaced with [Link].

S America to create single market South American leaders are set to create an economic and political bloc modelled on the European Union.
Business

Flu Vaccine Supply Cut in Half By LAURAN NEERGAARD     WASHINGTON (AP) -- Americans' supply of flu vaccine was abruptly cut in half Tuesday, prompting the government to ask most healthy adults to delay or skip flu shots so that the elderly and others most at risk from influenza can get scarce supplies.    British regulators unexpectedly shut down a major flu-shot supplier Tuesday, prompting a record shortage in this country just as flu season is about to begin...
Sci/Tech

Two Soldiers Attached To 1st Cav Charged With Murder Staff Sgt. Johnny Horne, Jr., and Staff Sgt. Cardenas Alban have been charged with murder in the death of an Iraqi, the 1st Cavalry Division announced Monday.

World

