Implementations include receiving trigger query data, the trigger query data identifying one or more trigger queries and one or more sets of authoritative users, each set of authoritative users being associated with a respective trigger query, providing a plurality of trigger query and authoritative user pairs, each trigger query and authoritative user pair identifying a trigger query and an authoritative user from a set of authoritative users associated with the trigger query, for each trigger query and authoritative user pair: generating a snippet based on user data, the user data being associated with the authoritative user in one or more computer-implemented services, each snippet being specific to the trigger query and specific to the authoritative user, and storing one or more snippets in computer-readable memory, each snippet being associated with the trigger query and the authoritative user for which the snippet was generated.