instruction:
In this task, you will be shown a passage. You need to write a fill-in-the-gap question based on your understanding of the events that might be inferred from the passage. Your question should be answerable based on the passage and only have one correct answer. Show the gap in your question with a _ .
question:
Nairobi, Kenya (CNN) -- In the worst single incident for Kenyan police in living memory, 38 officers were killed in northern Kenya over the weekend by heavily armed cattle rustlers, according to injured police reservists who were on the scene. Local media reports put the number at between 37 and 42 dead. Internal Security Minister Katoo Ole Metito would not give a total figure on how many police officers had died. Read more: Attack on Sunday school leaves child dead, others wounded The police officers were part of an operation to recover cattle belonging to the Samburu tribe that had been stolen by the Turkana tribe, according to the minister. They were ambushed in a valley when a large group of Turkana fired on police, leaving dozens dead and many injured.The officers were trying to recover stolen cattle, a security official saysThe Turkana and Samburu tribes have engaged in tit-for-tat cattle rustling operationsIt's not unusual to see cattle herders armed with automatic riflesThe security minster says the government is trying to reconcile the two communities
answer:
The Kenyan government intervened and gave an ultimatum for the _ to return the cattle last Friday, or it would respond with force.


question:
The Pentagon last night admitted that one of its laboratories may accidentally have sent live anthrax to Britain. Technicians sent samples to a UK research facility without making sure the spores had been killed with radiation, officials said. The lab, run by British staff, has not been identified and no details have been released about how the samples were transported. The US Department of Defence claimed there was ‘no known risk’ to the public and an ‘extremely low risk’ to lab workers. But biosafety experts have sharply criticised the error and called for better precautions. The samples were shipped from Dugway army base which tests chemical weapons in a remote area of the Utah desert.A Pentagon laboratory may have sent live anthrax to Britain, it emergedSamples sent without making sure spores had been killed with radiationAnthrax can be deadly unless a patient is given large doses of antibioticsUS Department of Defence claimed there was 'no known risk' to the public
answer:
But the _ was sent samples from a batch in which live spores were found.


question:
A girl who overheard part of an incident involving Florida teenager Trayvon Martin can help prove he was killed "in cold blood" by George Zimmerman, a neighborhood watch volunteer, an attorney for Martin's family said Tuesday. The girl, who was dating the 17-year-old, "completely blows Zimmerman's absurd self-defense claim out of the water," lawyer Benjamin Crump told reporters. The girl -- who he said does not wish to be identified -- "connects the dots" about what happened that day when she lays out what she overheard while on the phone with him, he said. 911 calls paint picture of chaosSanford police say they asked all witnesses to come forwardGovernor says he will work to see "justice prevails"George Zimmerman was bleeding from the nose and back of his head, a police report saysThe 17-year-old was not armed when he was killed last month in Florida
answer:

_ was fatally shot on February 26 while walking to the house of his father's fiancee in Sanford after a trip to a nearby convenience store.