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: The papers presented show that all European countries are experiencing rapidly aging populations that will cause sharp increases in the cost of retirement income over the next several decades. Sentence 2: National pension systems currently adopted in Europe are in difficulties.
A: 
1