1. A computer program product for expanding a search query, the computer program product comprising: a computer readable storage medium and program instructions stored on the computer readable storage medium, the program instructions comprising: program instructions to receive one or more initial search results from a search engine, wherein the one or more initial search results are based, at least in part, on a search query; program instructions to generate a collection of events for the one or more initial search results, wherein events included in the collection of events are within a temporal proximity to at least one of the one or more initial search results; program instructions to determine a content of the collection of events based, at least in part, on natural language processing of at least one of the one or more initial search results included in the collection of events; program instructions to determine a search suggestion based, at least in part, on the content of the collection of events; and program instructions to send the search suggestion to the search engine, wherein the search engine provides the search suggestion and the one or more initial search results to a user.