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.

Q: original sentence: Paul tried to call George on the phone , but he wasn't successful . paraphrase: Paul and Bill tried to call George and John on the phone , but they weren't successful .

A: Number
****
Q: original sentence: Fred watched TV while George went out to buy groceries . After an hour he got back . paraphrase: perry watched tv while jerold went out to buy groceries . after an hour he got back .

A: Synonym
****
Q: original sentence: Susan knew that Ann's son had been in a car accident , because she told her about it . paraphrase: Susan and Hannah knew that Ann and Polly's sons had been in car accidents , because they told them about it .

A:
Number
****