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: There is a gap in the wall . You can see the garden behind it . paraphrase: There really is a gap in the wall . You can see the garden behind it .

SOLUTION: Adverb

PROBLEM: original sentence: Fred and Alice had very warm down coats , but they were not prepared for the cold in Alaska . paraphrase: Fred and Alice have very warm down coats , but they are not prepared for the cold in Alaska .

SOLUTION: Tense

PROBLEM: original sentence: Jane knocked on Susan's door , but there was no answer . She was out . paraphrase: Jane and Emma knocked on Susan and Lucy's door , but there was no answer . They were out .

SOLUTION:
Number