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.
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Question: original sentence: Anna did a lot better than her good friend Lucy on the test because she had studied so hard . paraphrase: Peter did a lot better than his good friend Jeff on the test because he had studied so hard .

Answer: Gender


Question: original sentence: George got free tickets to the play , but he gave them to Eric , because he was particularly eager to see it . paraphrase: George and Bob got free tickets to the play , but they gave them to Eric and Jeff , because they were particularly eager to see it .

Answer: Number


Question: original sentence: Bob paid for Charlie's college education . He is very grateful . paraphrase: dan paid for justin's college education . he is very grateful .

Answer:
Synonym