Detailed Instructions: 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'.
Q: Sentence 1: By 45,000 years ago, humans had weathered the comings and goings of a number of ice ages, had spread themselves throughout most of Africa, Europe and Asia, and had reached a population of roughly a million. Sentence 2: Humans existed 10,000 years ago.
A:
1