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.
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Question: original sentence: Fred covered his eyes with his hands , because the wind was blowing sand around . He lowered them when the wind stopped . paraphrase: Fred is covering his eyes with his hands , because the wind is blowing sand around . He lowers them when the wind stops .

Answer: Tense


Question: original sentence: At the Loebner competition the judges couldn't figure out which respondents were the chatbots because they were so advanced . paraphrase: At the Loebner competition the judges couldn't really figure out which respondents were the chatbots because they were so advanced .

Answer: Adverb


Question: original sentence: Bill passed the half-empty plate to John because he was hungry . paraphrase: The half-empty plate was passed by Bill to John because he was hungry .

Answer:
Voice