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].
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Question: A British national held hostage in Yemen has been freed in a 'military intelligence' operation, according to Foreign Secretary Philip Hammond. The Briton, who has been identified as Robert Douglas Semple, 64, was released by United Arab Emirates forces. The freed hostage had been working as a petroleum engineer in the Yemeni province of Hadramawt when he was kidnapped in February 2014. The UAE forces were based in Yemen's main port city of Aden, according to the state news agency WAM. The Yemeni agency reported that he had been held by al-Qaeda for 18 months. Mr Semple was taken to the Yemeni port city of Aden before being flown to Abu Dhabi by military plane on Saturday night, it added.Hostage identified as petroleum engineer Robert DouglasSemple, 64He was abducted in February 2014 while working in Hadramawt provinceForeign Secretary Philip Hammond made the announcement from TehranAbductions are common in Yemen, plagued by tribesmen and Al-Qaeda militants 
 Question:Abductions are frequent as armed tribesmen and al-_-linked militants take hostages in the hope of swapping them for prisoners or cash.

Answer: Qaeda


Question: (CNN) The Navy destroyer USS Mason fired countermeasures in the Red Sea on Saturday after it detected what it believed were incoming missiles. Officials Saturday night were uncertain about what exactly happened, if there were multiple incoming missiles or if there was a malfunction with the radar detection system on the destroyer. "We are aware of the reports and we are assessing the situation. All of our ships and crews are safe and unharmed," one US defense official told CNN. The USS Nitze and the USS Ponce were sailing nearby. There are initial unconfirmed reports of missiles possibly being fired from positions both ashore on Yemen and by small spotter boats operated by Houthi rebels.Officials Saturday night were uncertain about what exactly happenedThe Mason and its crew are all safe 
 Question:Early Thursday, the US launched tomahawk cruise missiles into Yemen targeting radar sites in _-held territory, sites the US claims were used to launch missiles in two previous incidents this week.

Answer: Houthi


Question: A judge has jailed the grandmother of missing mother Rebecca Minnock for ten days for repeatedly lying about her daughter Rebecca's disappearance with her grandson Ethan Williams. Louise Minnock's partner Andrew Butt was also sent to prison for 28 days by Bristol Crown Court for his role in the toddler's disappearance. A High Court Judge has appealed to Ms Minnock to hand herself in to authorities and assured her that she will be able to see her son in future. Ms Minnock, 35, fled her home in Highbridge, Somerset, with Ethan two weeks ago following a court order that he should live with his father, Roger Williams.Rebecca Minnock disappeared with three-year-old son Ethan 16 days agoThey went missing after judge ordered that Ethan was to live with his fatherNow grandmother Louise Minnock has been jailed for contempt of courtMrs Minnock was jailed for 10 days and her partner Andrew Butt for 28 
 Question:DC Davis said he tried to tell Butt he just wanted to see the safe return of _, but was told: 'Me and my family would all rather do ten years in prison rather than tell you where they are.'

Answer:
Ethan Williams