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.

Example Input: original sentence: Jane knocked on the door , and Susan answered it . She invited her to come out . paraphrase: Jane is knocking on the door , and Susan is answering it . She is inviting her to come out .
Example Output: Tense

Example Input: original sentence: Archaeologists have concluded that humans lived in Laputa 20,000 years ago . They hunted for evidence on the river banks . paraphrase: An archaeologist has concluded that a human lived in Laputa 20,000 years ago . He hunted for evidence on the river banks .
Example Output: Number

Example Input: original sentence: Sam and Amy are passionately in love , but Amy's parents are unhappy about it , because they are fifteen . paraphrase: Sam is passionately in love , but Sam's father is unhappy about it , because he is fifteen .
Example Output:
Number