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: The path to the lake was blocked , so we couldn't reach it . paraphrase: The path to the lake was blocked , so it couldn't be reached by us .

SOLUTION: Voice

PROBLEM: original sentence: Joe paid the detective after he delivered the final report on the case . paraphrase: Anne paid the detective after she delivered the final report on the case .

SOLUTION: Gender

PROBLEM: original sentence: Fred is the only man alive who still remembers my father as an infant . When Fred first saw my father , he was twelve years old . paraphrase: Fred is actually the only man alive who still really remembers my father as an infant . When Fred first saw my father , he actually was twelve years old .

SOLUTION:
Adverb