TASK DEFINITION: In this task, you're given a pair of sentences, sentence 1 and sentence 2. Your job is to write a single word that describes the genre that the two sentences belong to, such as face-to-face, government, letters, 9/11, slate, telephone, travel, verbatim, oup, fiction.
PROBLEM: Sentence 1: I bought two large tubes after your super review. Sentence 2: Your review convinced me not to purchase any tubes. 

SOLUTION: slate

PROBLEM: Sentence 1: that  was you can't really be sure of the quality of what you got you know Sentence 2: You can be sure that whay you got is top notch!

SOLUTION: telephone

PROBLEM: Sentence 1: In brief, the six types of case study, which we examine in chapter 3, are as  Sentence 2: We will be examining only one kind of case study in chapter 3.

SOLUTION:
government