11. A system, comprising: memory storing instructions; one or more processors executing the instructions stored in the memory to: identify a message formulated by a user via a computing device of the user, the message being provided for presentation to: at least a first additional user via a first additional computing device, and a second additional user via a second additional computing device; determine that at least one term included in the message is a vague term; based on the message, formulated by the user, being provided for presentation to the first additional user: identify user-restricted content associated with the first additional user, wherein the user-restricted content is personal to the first additional user, and wherein access to the user-restricted content is limitable by the first additional user, and use the user-restricted content associated with the first additional user to determine additional information that is related to the vague term wherein the additional information comprises one or more of: a date, a location, an address, and an identity of an entity; and provide the additional information for presentation with the message, wherein in providing the additional information, one or more of the processors are to provide the additional information for presentation to both: the first additional user via the first additional computing device, and the second additional user via the second additional computing device.
11. A system, comprising: memory storing instructions; one or more processors executing the instructions stored in the memory to: identify a message formulated by a user via a computing device of the user, the message being provided for presentation to: at least a first additional user via a first additional computing device, and a second additional user via a second additional computing device; determine that at least one term included in the message is a vague term; based on the message, formulated by the user, being provided for presentation to the first additional user: identify user-restricted content associated with the first additional user, wherein the user-restricted content is personal to the first additional user, and wherein access to the user-restricted content is limitable by the first additional user, and use the user-restricted content associated with the first additional user to determine additional information that is related to the vague term wherein the additional information comprises one or more of: a date, a location, an address, and an identity of an entity; and provide the additional information for presentation with the message, wherein in providing the additional information, one or more of the processors are to provide the additional information for presentation to both: the first additional user via the first additional computing device, and the second additional user via the second additional computing device. 16. The system of claim 11 , wherein in executing the instructions one or more of the processors are further to: identify an entity that is associated with the vague term, and wherein in determining additional information one or more of the processors are to: determine, from the user-restricted content, a second entity that is related to the entity, and determine at least some of the additional information based on the second entity.