TASK DEFINITION: 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'.
PROBLEM: Premise: The area of land that contributes water to a river network upstream of a given point on a river is called the drainage basin, or watershed, of the river at that point. 
 Hypothesis: All of the land drained by a river system is called its basin, or the "wet" term  watershed

SOLUTION: entails

PROBLEM: Premise: Hydrogen is the simplest atom, with one proton, one electron and no pesky neutrons. 
 Hypothesis: There are one electrons in the hydrogen atom.

SOLUTION: entails

PROBLEM: Premise: They mostly have four limbs but some aquatic mammals have no limbs or limbs modified into fins and the forelimbs of bats are modified into wings. 
 Hypothesis: Birds have four limbs.

SOLUTION:
neutral