TASK DEFINITION: You will be given two sentences. One of them is created by paraphrasing the original one, with changes on an aspect, or using synonyms. Your task is to decide what is the difference between two sentences. Types of change are explained below:
 Tense: The verbs in the sentence are changed in tense.
Number: Plural nouns, verbs and pronouns are changed into single ones or the other way around.
Voice: If the verbs are in active voice, they're changed to passive or the other way around.
Adverb: The paraphrase has one adverb or more than the original sentence.
Gender: The paraphrase differs from the original sentence in the gender of the names and pronouns.
Synonym: Some words or phrases of the original sentence are replaced with synonym words or phrases. Changes in the names of people are also considered a synonym change. Classify your answers into Tense, Number, Voice, Adverb, Gender, and Synonym.
PROBLEM: original sentence: Anna did a lot worse than her good friend Lucy on the test because she had studied so hard . paraphrase: Anna is doing a lot worse than her good friend Lucy on the test because she studies so hard .

SOLUTION: Tense

PROBLEM: original sentence: In July , kamchatka declared war on Yakutsk . Since Yakutsk's army was much better equipped and ten times larger , they were victorious within weeks . paraphrase: in july , yelizovo declared war on kapitonovka . since kapitonovka's army was much better equipped and ten times larger , they were victorious within weeks .

SOLUTION: Synonym

PROBLEM: original sentence: John couldn't see the stage with Billy in front of him because he is so short . paraphrase: John and Harry couldn't see the stage with Billy and Jack in front of them because they were so short .

SOLUTION:
Number