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: James asked Robert for a favor but he was refused . paraphrase: James and Henry asked Robert and William for a favor but they were refused .

SOLUTION: Number

PROBLEM: original sentence: This book introduced Shakespeare to Ovid ; it was a major influence on his writing . paraphrase: This book introduced Shakespeare and Chaucer to Ovid and Virgil ; they were a major influence on their writing .

SOLUTION: Number

PROBLEM: original sentence: Carol believed that Rebecca regretted that she had stolen the watch . paraphrase: Jack believed that David regretted that he had stolen the watch .

SOLUTION:
Gender