1. A non-transitory computer-readable storage medium having computer-executable instructions stored thereon that, when executed by a computer, cause the computer to: receive an identifier of a collection of items; determine individual items belonging to the collection of items using item relationship data specifying relationships between the individual items and the collection of items; retrieve customer reviews regarding the individual items; parse a plurality of sentences from the customer reviews; generate a list of topics for each of the individual items from the plurality of sentences; identify one or more common topics from the list of topics of each of the individual items; generate an overall list of topics discussed across all of the individual items from the plurality of sentences and assign each sentence in the plurality of sentences to one or more topics in the overall list of topics; extract one or more quotes from the sentences assigned to topics matching the one or more common topics; and display the one or more quotes to a customer in conjunction with information regarding the collection of items.