In this task, you're given a pair of sentences, sentence 1 and sentence 2. Your job is to classify the genre of the sentences from the 10 options displayed. Indicate your answer by entering the number of the choice as 1-10.
Q: Sentence 1: At my Victorian grandmama's knee I was taught that one uses the abbreviation messrs (plural of mister) only when addressing two men with the same surname residing at the same address--an admittedly Victorian situation. Sentence 2: The convention for how to use messrs has evolved over time. Choices: 1. FACE-TO-FACE, 2. GOVERNMENT, 3. LETTERS, 4. 9/11, 5. SLATE, 6. TELEPHONE, 7. TRAVEL, 8. VERBATIM, 9. OUP, 10. FICTION.
A: 
4