Instructions: In this task, you will be presented with a premise and a hypothesis sentence. Determine whether the hypothesis sentence entails (implies), contradicts (opposes), or is neutral with respect to the given premise sentence. Please answer with "Contradiction", "Neutral", or "Entailment".
Input: Premise: Frederick "Dennis" Greene (January 11, 1949 September 5, 2015) was an American singer who was a member of Sha Na Na who were formed in 1969 at Columbia University in New York as the Columbia Kingsmen. The name change to Sha Na Na occurred because of another group with a similar name, which was known for the song Louie Louie. <sep> Hypothesis: The group Sha Na Na formed when Frederick "Dennis" Greene was 21 years old.
Output:
Contradiction