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: Annie Lennox's daughter has paid tribute to her boyfriend after police pulled a body, believed to be his, from the Hudson River. Tali Lennox, 22 was kayaking with her boyfriend Ian Jones, 32, on the Hudson River in upstate New York on Saturday when their kayak overturned. Police announced yesterday that they had recovered a body and suspended their search. The body was pulled from the water around noon on Monday by police near to the Poughkeepsie yacht club just north of the Vanderbilt property Mills Mansion. 'My heart is shattered,' Tali wrote on her Instagram. 'My best friend, my soul mate, my partner in crime & creativity, the love & light of my life is no longer with me.Tali Lennox, 22, and Ian Jones, 32, were on Hudson River on SaturdayKayak flipped close to Staatsburg, about 100 miles north of New YorkBody was found at noon on Monday on third day of search for missing manSearch was suspended as 'body matched Jones's description', police saidTali posted heartbroken message on Instagram, in honour of her boyfriend 
 Question:Authorities used 'extensive resources' to search for _ after a 911 call reported him missing.

Ian Jones