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: pH In chemistry, pH is a measure of the concentration of hydrogen ions in a solution, which is a measure of acidity or alkalinity. 
 Hypothesis: The concentration of the hydrogen ion in a solution can be calculated when the ph is known.

SOLUTION: entails

PROBLEM: Premise: Human actions have caused the extinction of hundreds of species of birds, and some 1,200 species  are threatened with extinction today. 
 Hypothesis: Around 1200 species of birds are currently at risk of extinction due to human activity.

SOLUTION: entails

PROBLEM: Premise: Tricuspid valve One of the four valves within the heart, this three cusped valve separates the right atrium from the right ventricle. 
 Hypothesis: There are four valves in the heart.

SOLUTION:
entails