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 police arrested all of the gang members . They were trying to stop the drug trade in the neighborhood . paraphrase: All of the gang members were arrested by the police . They were trying to stop the drug trade in the neighborhood .

SOLUTION: Voice

PROBLEM: original sentence: George got free tickets to the play , but he gave them to Eric , because he was particularly eager to see it . paraphrase: Free tickets to the play were gotten by George , but they were given by him to Eric , because he was particularly eager to see it .

SOLUTION: Voice

PROBLEM: original sentence: The drain is clogged with hair . It has to be cleaned . paraphrase: the sink is clogged with grease . it has to be cleaned .

SOLUTION:
Synonym