Have you ever tried searching Airbnb reviews to learn about specific characteristics of an accomodation you are trying to book? The current system simply allows for keyword-based search. However, keyword-based search is seldom exhaustive and does not show the best possible results to the end-user.
Consider the example in the review search above. The user is interested to answer the following question: How is the location of the listing? As shown in the search results, the word location is highlighted and it is basically keyword-based search.