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: The mangrove's distinctive companion is the low, trunkless nipa palm, whose curtain of fronds has traditionally provided roofing material for coastal huts. Sentence 2: Palms provide waterproof and durable roofing material.
travel