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.

[EX Q]: original sentence: James asked Robert for a favor but he refused . paraphrase: James and Henry asked Robert and William for a favor but they refused .
[EX A]: Number

[EX Q]: original sentence: The police arrested all of the gang members . They were trying to run the drug trade in the neighborhood . paraphrase: The police are arresting all of the gang members . They are trying to run the drug trade in the neighborhood .
[EX A]: Tense

[EX Q]: original sentence: The scientists are studying three species of fish that have recently been found living in the Indian Ocean . They appeared two years ago . paraphrase: Three species of fish that have recently been found living in the Indian Ocean are being studied by scientists . They began two years ago .
[EX A]:
Voice