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: The European Union's top prosecutor says she has been told that Islamic State terrorists are being smuggled across the Mediterranean hidden among migrants. Michele Coninsx, head of the EU's judicial co-operation agency Eurojust, has confirmed she received the intelligence as part of the organisation's efforts to respond to illegal immigration, terrorism and cybercrime. Ms Coninsx said Eurojust's co-ordination efforts are ongoing and she could not divulge what EU nations have told the agency. But she said groups such as ISIS are also using proceeds from people-trafficking to fund terrorism. Ms Coninsx, a career prosecutor from Belgium said: 'We're going after the criminals. We're going after the money.Michele Coninsx says ISIS fighters are crossing Mediterranean into EuropeAdds they are being smuggled across on boats hidden among migrantsMs Coninsx added that the flow of migrants into Italy has risen fivefold 
 Question:This year, about 70,000 migrants have been rescued, many by an _-led naval operation.

European Union