Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: (CNN) On the first day of the new school year in Russia, students learned an important lesson directly from their president -- who he thinks will rule the world. Speaking to students during a national "open lesson" from the city of Yaroslavl, northeast of Moscow, Russian President Vladimir Putin said the country that takes the lead in the sphere of computer-based artificial intelligence (AI) will rule. "Artificial intelligence is the future not only of Russia but of all of mankind," said Putin. "There are huge opportunities, but also threats that are difficult to foresee today." "Whoever becomes the leader in this sphere will become the ruler of the world," he said, adding that it would be better to prevent any particular "pair of hands" from achieving a monopoly in the field.The Russian President gives an "open lesson" to more than a million schoolchildren"Whoever becomes the leader in this sphere will become the ruler of the world," he says 
 Question:While in _, Putin didn't miss the opportunity to show off his hockey skills during a visit to a new school.

Yaroslavl