Entailment evaluation device, entailment evaluation method, and recording medium

An entailment evaluation method comprising:

• generating first information indicating at least an order of occurrence of events of first and second simple sentences included in a hypothesis text;
• generating second information indicating at least an order of occurrence of events of third and fourth simple sentences included in a target text, the third simple sentence being related to the first simple sentence, the fourth simple sentence being related to the second simple sentence;
• obtaining a calculation result by comparing, based on the first and second information, the order of occurrence of events of first and second simple sentences and order of occurrence of events of third and fourth simple sentences;
• and
• determining, based on at least the calculation result, whether or not the target text entails the hypothesis text.

A non-transitory recording medium storing a program allowing a computer to execute:

• generating first information indicating at least an order of occurrence of events of first and second simple sentences included in a hypothesis text;
• generating second information indicating at least the order of occurrence of events of third and fourth simple sentences included in a target text, the third simple sentence being related to the first simple sentence, the fourth simple sentence being related to the second simple sentence;
• obtaining a calculation result by comparing, based on the first and second information, the order of occurrence of events of first and second simple sentences and order of occurrence of events of third and fourth simple sentences;
• and
• determining, based on at least the calculation result, whether or not the target text entails the hypothesis text.