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: At the Loebner competition the judges couldn't figure out which respondents were the chatbots because they were so stupid . paraphrase: At the Loebner competition it could not be figured out by the judges which respondents were the chatbots because they were so stupid .

SOLUTION: Voice

PROBLEM: original sentence: The firemen arrived before the police because they were coming from so far away . paraphrase: the engineman arrived before the cops because they were coming from so far away .

SOLUTION: Synonym

PROBLEM: original sentence: They broadcast an announcement , but a subway came into the station and I couldn't hear over it . paraphrase: they broadcast a message, but a metro came into the station and i couldn't hear over it .

SOLUTION:
Synonym