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'.

Input: Consider Input: Sentence 1: The Antarctic ozone 'hole' is defined as a thinning of the ozone layer, over the continent, to levels significantly below pre-1979 levels. Sentence 2: The ozone hole is above Antarctica.

Output: 1


Input: Consider Input: Sentence 1: The spread of AIDS in Africa is driven not by unsafe sex but by unsafe medical practice, according to research published last week. Sentence 2: AIDS spreads in Africa.

Output: 1


Input: Consider Input: Sentence 1: For example, the fields of Western farmers feed the United States and many other parts of the world, and India's irrigation systems have enabled that country to be self-sufficient in food production since 1974. In addition, in many parts of the world dams have helped to remedy life-threatening problems such as poverty from lack of economic development, famine as a result of drought, devastation from floods, and continued disease from lack of potable water supplies. Sentence 2: Dam building prevents life-threatening situations.


Output: 1