8. A computer program product stored in a computer readable storage medium, comprising computer instructions that, when executed by an information handling system, causes the information handling system to utilize unstructured corpora by performing actions comprising: receiving, from a first user, a question at a question answering (QA) system; identifying a set of one or more second users that are subjects of the question; generating a private corpora associated with the first user, wherein the private corpora is generated from a first set of one or more private data stores associated with a first user and a second set of one or more private data stores associated with the set of one or more second users, wherein access to the second set of private data stores is provided to the first user by the set of second users; retrieving responsive data to the question from the private corpora, wherein the responsive data is ranked based on a relevance to the question; identifying one or more likely answers based on the ranked responsive data; and providing the one or more likely answers to the first user.
8. A computer program product stored in a computer readable storage medium, comprising computer instructions that, when executed by an information handling system, causes the information handling system to utilize unstructured corpora by performing actions comprising: receiving, from a first user, a question at a question answering (QA) system; identifying a set of one or more second users that are subjects of the question; generating a private corpora associated with the first user, wherein the private corpora is generated from a first set of one or more private data stores associated with a first user and a second set of one or more private data stores associated with the set of one or more second users, wherein access to the second set of private data stores is provided to the first user by the set of second users; retrieving responsive data to the question from the private corpora, wherein the responsive data is ranked based on a relevance to the question; identifying one or more likely answers based on the ranked responsive data; and providing the one or more likely answers to the first user. 9. The computer program product of claim 8 wherein the actions further comprise: prior to receiving the question: receiving a set of access credentials from the first user and the set of second users, wherein the access credentials are used to access the first and second sets of private stores; and utilizing the set of access credentials to access the first and second sets of private data stores during the generation of the private corpora.