Given the task definition and input, reply with output. 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'.

Sentence 1: Tourists pay millions of dollars a year to come and see Africa 's wildlife and smugglers pay millions more in strictly illegal purchases of ivory and rhino horn from poachers. Sentence 2: African countries encourage keeping animals alive to attract tourists.
0