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.

Sentence 1: However, cost models have significant limitations in accuracy unless their underlying assumptions of system size and cost drivers are carefully chosen and reflect the agency's previous experience in system development. Sentence 2: Cost models aren't usually too accurate, but sometimes they can be.
government

Sentence 1: Co-location helps the agencies meet three important goals. Sentence 2: The agencies don't use co-location to achieve goals.
government

Sentence 1: Wow, one? Szymek said smoothing down his hairsprayed Mohawk. Sentence 2: Szymek smoothed his hair.

fiction