The mock listing data is in the file database/data.json. This file includes a JSON-encoded array of 30 objects, with each object representing a different listing. Having built the listing page prototype, you'll no doubt recognize a lot of the same properties on these objects, including the title, address, and description.
database/data.json:
[ { "id": 1, "title": "Central Downtown Apartment with Amenities", "address": "...", "about": "...", "amenity_wifi": true, "amenity_pets_allowed": true, "amenity_tv": true, "amenity_kitchen": true, "amenity_breakfast": true, "amenity_laptop": true, "price_per_night": "$89" "price_extra_people": "No charge"...