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: Archaeologists have concluded that humans lived in Laputa 20,000 years ago . They hunted for evidence on the river banks . paraphrase: An archaeologist has concluded that a human lived in Laputa 20,000 years ago . He hunted for evidence on the river banks .

SOLUTION: Number

PROBLEM: original sentence: I couldn't find a spoon , so I tried using a pen to stir my coffee . But that turned out to be a bad idea , because it got full of coffee . paraphrase: I couldn't find spoons , so I tried using pens to stir my coffees . But that turned out to be a bad idea , because they got full of coffee .

SOLUTION: Number

PROBLEM: original sentence: Anna did a lot worse than her good friend Lucy on the test because she had studied so hard . paraphrase: heather did a lot worse than her good friend lara on the test because she had studied so hard .

SOLUTION:
Synonym