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.
--------
Question: original sentence: This book introduced Shakespeare to Goethe ; it was a major influence on his writing . paraphrase: This book introduced Shakespeare and Chaucer to Goethe and Marx ; they were a major influence on their writing .

Answer: Number


Question: original sentence: Emma did not pass the ball to Janie although she saw that she was open . paraphrase: Emma isn't passing the ball to Janie although she sees that she is open .

Answer: Tense


Question: original sentence: Anna did a lot better than her good friend Lucy on the test because she had studied so hard . paraphrase: Anna and Lisa did a lot better than their good friends Lucy and Paula on the test because they had studied so hard .

Answer:
Number