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: The ivory ban was imposed by CITES in 1989 after a wave of poaching across Africa saw elephant numbers fall from an estimated 1.3 million to a few hundred thousand. Sentence 2: The ban on ivory trade has been effective in protecting the elephant from extinction.
0