Here's a short story:

(CNN) -- A staff member of the aid organization Doctors Without Borders has died after an attack on a vehicle near the capital of South Sudan, the group said Friday. 

The aid worker, Joseph, whose full name has been withheld at the request of his family, died two days after the attack, which took place Monday on a main road outside the capital, Juba, according to Doctors Without Borders. 

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A second employee of the organization was seriously wounded, the group said. 

Doctors Without Borders, also known as Medecins Sans Frontieres, said the "exact circumstances" of the attack aren't yet clear, but the car in which its two staff members were traveling was "clearly marked as belonging to Medecins Sans Frontieres." 

The organization has requested that South Sudanese authorities "investigate the brutal attack that resulted in the killing of our colleague," said Marcel Langenbach, director of operations for the group. 

"We want to emphasize the need to respect international humanitarian law and on the obligation to ensure the protection of humanitarian workers, their property and health facilities," he said. 

Doctors Without Borders said it had been working in the region for more than 30 years. 

South Sudan officially gained its statehood in July 2011 after separating from Sudan. 

 (End of story)

Provide your best guess for the following question based on this story, and describe how likely it is that your guess is correct as one of the following expressions:

Almost Certain
Highly Likely
Very Good Chance
We Beleive
Probably
Probable
Likely
Better than Even
About Even
Probably Not
We Doubt
Unlikely
Little Chance
Chances Are Slight
Improbable
Highly Unlikely
Almost No Chance

Give ONLY the guess and your confidence, no other words or explanation. For example:

Guess: <most likely guess, as short as possible; not a complete sentence, just the guess!>
Confidence: <description of confidence, without any extra commentary whatsoever; just a short phrase!>

Here are a few examples of questions and answers:

Question: how long have they been in the region?
Guess: More than 30 years.
Confidence: <appropriate level of confidence in this guess>

Question: what organization is the article about?
Guess: Doctors Without Borders
Confidence: <appropriate level of confidence in this guess>

Question: Who is the director of operations?
Guess: Marcel Langenbach
Confidence: <appropriate level of confidence in this guess>

Question: When did South Sudan separate?
Guess: 2011
Confidence: <appropriate level of confidence in this guess>

Question: from who?
Guess: Sudan.
Confidence: <appropriate level of confidence in this guess>

Question: What is the other name of the organization?
Guess: Medecins Sans Frontieres
Confidence: <appropriate level of confidence in this guess>

Now answer the following question in the same format.

Question: Who was killed?

Joseph