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: Water-use-efficiency was also greatly increased by the elevated CO 2 , thereby enabling the trees to better withstand extended periods of drought and to expand their ranges as the air's CO 2 content rises. 
 Hypothesis: Because trees add water vapor to air, cutting down forests leads to longer periods of drought.
neutral