Definition: 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].
Input: More Physical Education Time May Fight Obesity in Girls By RICK CALLAHAN    (AP) -- Just an extra hour of exercise a week could significantly cut obesity among young overweight girls, according to a study that researchers say could lead to major changes in the way schools fight obesity.    The study - the largest look yet at obesity among young children - did not show the same results for boys, possibly because they generally get more exercise than girls...

Sci/Tech