TASK DEFINITION: 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.
PROBLEM: 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 is getting free tickets to the play , but he is giving them to Eric , because he is particularly eager to see it .

SOLUTION: Tense

PROBLEM: original sentence: Susan knows all about Ann's personal problems because she is nosy . paraphrase: Susan and Joan know all about Ann and Lucy's personal problems because they are nosy .

SOLUTION: Number

PROBLEM: original sentence: Frank was upset with Tom because the toaster he had sold him didn't work . paraphrase: Elizabeth was upset with Mary because the toaster she had sold her didn't work .

SOLUTION:
Gender