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: Adam can't leave work here until Bob arrives to replace him . If Bob had left home for work on time , he would be here by this time . paraphrase: Adam couldn't leave work here until Bob arrived to replace him . If Bob had left home for work on time , he would have been here by this time .

SOLUTION: Tense

PROBLEM: original sentence: Everyone really loved the oatmeal cookies ; only a few people liked the chocolate chip cookies . Next time , we should make more of them . paraphrase: everyone really loved the brown butter bourbon spice cookies ; only a few people liked the caramel pecan cookies . next time , we should make more of them .

SOLUTION: Synonym

PROBLEM: original sentence: The sun was covered by a thick cloud all morning , but luckily , by the time the picnic started , it was out . paraphrase: the sun was covered by a thick fog all morning , but luckily , by the time the picnic started , it was out .

SOLUTION:
Synonym