There are production data from the following text types:

•  free conversation (session names like: P-D??K?-???)
•  narratives: retellings of the content of silent films, and personal narratives (session names like: P-D??E?-???)
•  opinions and attitudes: discussion of learners' attitudes towards topics of general interest (like common law marriage) (session names like: P-D??M?-???)
•  instruction: the learner has to instruct a native speaker how to act out some scene, or construct some object (session names like: P-D??I?-???)
•  problem solving: the learner has to imagine a difficult situation (e.g. being in a foreign country and loosing money and documents) and to find and discuss a solution (session names like: P-D??P?-???)
•  description: picture descriptions and a description of the distribution of furniture in a flat (session names like: P-D??D?-???)