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: front The boundary between two air masses of different temperature and density. 
 Hypothesis: In weather terms, the boundary between two air masses is called front.
entails

Premise: Silyl enol ethers in organic chemistry are a class of organic compounds that share a common functional group composed of an enolate bonded through its oxygen terminus to an organosilicon group. 
 Hypothesis: An ether is an organic compound in which two hydrocarbon groups are bonded to the same  oxygen atom.
neutral

Premise: When blood vessels constrict, the flow of blood is restricted or decreased, thus retaining body heat or increasing vascular resistance. 
 Hypothesis: Blood flow decrease when blood vessels constrict.
entails