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: Joe has sold his house and bought a new one a few miles away . He will be moving into it on Thursday . paraphrase: Joe and Bill have sold their houses and bought new ones a few miles away . They will be moving into them on Thursday .

SOLUTION: Number

PROBLEM: original sentence: This morning , Joey built a sand castle on the beach , and put a toy flag in the highest tower , but this afternoon the wind knocked it down . paraphrase: This morning , Joey cheerfully built a sand castle on the beach , and elegantly put a toy flag in the highest tower , but this afternoon the wind fiercely knocked it down .

SOLUTION: Adverb

PROBLEM: original sentence: Joe's uncle can still beat him at tennis , even though he is 30 years younger . paraphrase: Joe and David's uncles can still beat them at tennis , even though they are 30 years younger .

SOLUTION:
Number