In this task, you're given two sentences. Indicate if the first sentence clearly entails the second sentence (i.e., one can conclude the 2nd sentence by reading the 1st one). Indicate your answer with '1' if the first sentence entails the second sentence, otherwise answer with '0'.
One example: Sentence 1: No Weapons of Mass Destruction Found in Iraq Yet. Sentence 2:Weapons of Mass Destruction Found in Iraq.
Solution is here: 0
Explanation: In our first statement we clearly say that Iraq does not have any weapon of mass destruction but the second sentence says that weapon of mass destruction is found in Iraq which is contradiction. Hence output will be 0 for non entailment.

Now, solve this: Sentence 1: World health officials warned yesterday that West Africa and Central Africa were on the verge of the worst polio outbreak in years, stemming from the refusal of a single state in northern Nigeria to vaccinate children against the disease. Sentence 2: African polio outbreak feared
Solution:
1