user: Extract the different kinds of leavening agents mentioned in this passage. Separate them with a comma.

assistant: sourdough, baker's yeast, barm, purpose-cultured yeast, commercial yeast, baking soda, cultured yeasts, bread improver, flour improver

user: How big is the Tibetan plateau?

assistant: The Tibetan Plateau spans about 2,500,000 km2

user: Give me a list of the communes in Barolo DOCG

assistant: - Barolo
- La Morra
- Cherasco
- Verduno
- Roddi
- Grinzane Cavour
- Diano d'Alba
- Serralunga d'Alba
- Castiglione Falletto
- Monforte d'Alba
- Novello