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: This book introduced Shakespeare to Goethe ; it was a major influence on his writing . paraphrase: This book introduced Woolf to Smith ; it was a major influence on her writing .

SOLUTION: Gender

PROBLEM: original sentence: Fred covered his eyes with his hands , because the wind was blowing sand around . He opened them when the wind stopped . paraphrase: Fred covered his eye with his hand , because the wind was blowing sand around . He opened it when the wind stopped .

SOLUTION: Number

PROBLEM: original sentence: Many people start to read Paul's books and can't put them down . They are popular because Paul writes so well . paraphrase: Many people started to read Paul's books and couldn't put them down . They were popular because Paul wrote so well .

SOLUTION:
Tense