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: I took the water bottle out of the backpack so that it would be handy . paraphrase: I took the water bottles out of the backpacks so that they would be handy .

SOLUTION: Number

PROBLEM: original sentence: Ann asked Mary what time the library closes , but she had forgotten . paraphrase: Luke asked Henry what time the library closes , but he had forgotten .

SOLUTION: Gender

PROBLEM: original sentence: I poured water from the bottle into the cup until it was full . paraphrase: I poured water from the bottles into the cups until they were full .

SOLUTION:
Number