1. A project documentation system for generating documentation of a project from multimodal communications between users, stored in a database, the system comprising: a matching circuit configured to match the multimodal communications between users stored in the database to the project; an identification circuit configured to associate a chat thread of the multimodal communications to a sub-project of the project; a relating circuit configured to relate words of the chat thread and words in a text of the project; an extracting and creating circuit configured to extract text of the chat thread that is relevant to the text of the project and create a document including the relevant text of the chat thread; and a decision circuit configured to decide whether to update the document including the relevant text created by the extracting and creating circuit with newly extracted text based on a similarity between data of the document and the newly extracted text to avoid redundancies within the created document.