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].

A friend played an elaborate prank on his mate by pretending to be a woman his chum met at a Halloween party - and engaging him in a lengthy text exchange. Ollie, from Portrush, Northern Ireland, tricked his unnamed friend after the pal left with the woman he met in Kelly's nightclub but didn't get her number. Mischievous Ollie then texted his Army-worker friend, from Lisburn, the next day pretending to be the mystery woman and even arranged to meet up with her for a date. The friend thought he was texting the unnamed woman for two days, sprinkling his messages with endearments and calling her 'babe' before Ollie took pity on him and broke the news during a Facetime chat.Ollie, from Northern Ireland, pranked his mate who met a girl on a night outHe pretended to be Rachel and flirted with him for two days over textBut after making a date to 'Netflix and chill' Ollie reveals the truth to his pal 
 Question:He sent: 'Hi it's _ from last night from Kelly's,' adding that he hoped she got home safely after the drunken evening.
Rachel

A series of chilling text messages that a suicidal father sent to his increasingly panicked ex-girlfriend in the final moments before he allegedly threw their baby son to his death off a bridge has emerged. As he stood on Connecticut's Arrigoni Bridge with his seven-month-old son Aaden on Sunday night, Tony Moreno, 22, exchanged dozens of texts with his former partner, 19-year-old Adrianne Oyola. In separate messages, he told her: 'Enjoy your new life without us', 'There is no more days [sic]' and 'You're not a parent anymore' - prompting Oyola to frantically ask about her son's whereabouts. Moreno then wrote: 'He's dead', followed by 'And soon I will be too.' Shortly after, the father apparently leaped from the 90ft bridge himself - having already hurled Aaden into the water below.Tony Moreno, 22, admits throwing his seven-month-old son, Aaden, off Connecticut's Arrigoni Bridge - before jumping himself, officials sayOn night of alleged murder, he sent chilling texts to his former girlfriendHe told Adrianne Oyola: 'Enjoy your new life without us' and 'He's dead'An increasingly panicked Oyola begged for information about their childAs Moreno fell silent, she text him: 'Please don't hurt Aaden... Please!!!'On Tuesday, Aaden was found dead in Connecticut River 15 miles awayMoreno was rescued from water and is now alert and stable in hospitalHe has been charged with murder and is being held on $2million bondOyola had obtained a restraining order against Moreno but it was overturned on June 29 
 Question:_ was nowhere to be seen, but his empty stroller was sat on the bridge.
Aaden

It may look like a run-of-the mill paddock, but beneath the surface lies a breath-taking phenomenon. Situated 450 km southeast of Adelaide is Mount Gambier, one of the few places in the world with the water conditions and soft limestone bedrock that give rise to spectacular underground sinkholes. Stunning images show specialist divers exploring otherworldly sites such as the 65 metre deep Kilsby’s Sinkhole and the 120 metre deep Shaft, which lie below seemingly mundane farms and paddocks. The caverns are the epicentre of The Cave Divers Association of Australia, who navigate the sites in the name of science. ‘Most people are drawn to the sport for the challenge and exploration, but they become passionate about the scientific elements afterwards,’ said John Vanderleest, the national director of the Cave Divers Association of Australia.Mount Gambier is one of the few cities in the world with the right conditions for underground sinkholesIt features spectacular sites like Kilsby’s Sinkhole and the The Shaft, which are found below paddocksThe caverns are among 30 identified cave sites used by the The Cave Divers Association of AustraliaCave diving involves rigorous training to explore elusive caves using specified gear and equiptment 
 Question:_ use scuba gear and harnesses to traverse the caverns and unearth marine life and geographic discoveries.

The Cave Divers Association of Australia