You will be given a definition of a task first, then some input of the task.
You are given two sentences. You have to find if there is entailment or agreement of the Hypothesis by the Premise. From the given pair of sentences, you should identify if there is enough information in the Premise to support the claim made in the Hypothesis. The Premise may not exactly be the same as Hypothesis. Your task is to return 'entails' if the premise supports hypothesis else return 'neutral'.

Premise: The promastigotes are slender, spindle-shaped cells with a single flagellum that endows them with motility. 
 Hypothesis: In humans, the sperm cell is the only cell with the  flagella structure that enables motility.
Output:
neutral