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: George got free tickets to the play , but he gave them to Eric , even though he was particularly eager to see it . paraphrase: gary got free tickets to the play , but he gave them to wes , even though he was particularly eager to see it .

SOLUTION: Synonym

PROBLEM: original sentence: I took the water bottle out of the backpack so that it would be handy . paraphrase: I took the water bottles out of the backpacks so that they would be handy .

SOLUTION: Number

PROBLEM: original sentence: The customer walked into the bank and stabbed one of the tellers . He was immediately taken to the police station . paraphrase: The customer walked into the bank and stabbed one of the tellers . She was immediately taken to the police station .

SOLUTION:
Gender