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: Spawning of Interloper Fish in Potomac Worries Experts With the evidence of the northern snakehead fish's spawning, hope is fading along the Potomac River that the aggressive, toothy Asian invader can be stopped.

Sci/Tech