In one embodiment, a method includes A method comprising, by one or more computing devices of an online social network, receiving, from a client system of a first user of the online social network, a post that is parsed to identify a query, identifying one or more topics and one or more query-domains matching the query, searching an answers-index to identify one or more query-answer sets responsive to the query and matching at least one of the identified topics and at least one of the identified domains, searching, for each entity identified in each query-answer set, a posts-index to identify one or more comments corresponding to the identified entity, calculating a score for each comment based on social signals associated with the comment, and sending, to the client system of the first user, a suggested-answers page including references to each comment having a score greater than a threshold score.