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: Fred watched TV while George went out to buy groceries . After an hour he got back . paraphrase: TV was watched by Fred while George went out to buy groceries . After an hour he got back .

SOLUTION: Voice

PROBLEM: original sentence: Pete envies Martin because he is very successful . paraphrase: Pete envied Martin because he was very successful .

SOLUTION: Tense

PROBLEM: original sentence: I'm sure that my map will show this building ; it is very good . paraphrase: I'm sure that my map will clearly show this building ; it is very good .

SOLUTION:
Adverb