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.

Example Input: original sentence: I took the water bottle out of the backpack so that it would be handy . paraphrase: I took the water bottles out of the backpacks so that they would be handy .
Example Output: Number

Example Input: original sentence: John was doing research in the library when he heard a man humming and whistling . He was very annoyed . paraphrase: Mary was doing research in the library when she heard a woman humming and whistling . She was very annoyed .
Example Output: Gender

Example Input: original sentence: This book introduced Shakespeare to Goethe ; it was a major influence on his writing . paraphrase: this book introduced john milton to dante ; it was a major influence on his writing .
Example Output:
Synonym