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: The dog chased the cat , which ran up a tree . It waited at the top . paraphrase: The cat was chased by the dog , which ran up a tree . It waited at the top .

SOLUTION: Voice

PROBLEM: original sentence: Sam tried to paint a picture of shepherds with sheep , but they ended up looking more like golfers . paraphrase: Sam is trying to paint a picture of shepherds with sheep , but they are ending up looking more like golfers .

SOLUTION: Tense

PROBLEM: original sentence: Thomson visited Cooper's grave in 1765 . At that date he had been dead for five years . paraphrase: Jane visited Emma's grave in 1765 . At that date she had been dead for five years .

SOLUTION:
Gender