Passage: The cooking event with refugees gave the participants the idea to have refugees give cooking lessons. The idea was developed with the help of the Social Impact Lab in Berlin in the spring of 2014. It was important for the founders to have locals and refugees come together as equals. Through the leading part that refugees play in the cooking lessons "the humility of a petitioner was replaced by the confidence of an expert."Later a cook book was published that included 36 recipes from 27 refugees. The cooks came from countries such as Afghanistan, Syria, Guinea, Niger, Macedonia and Chechnya. A second cook book was later published with recipes in both German and English.From the beginning the idea of the Foundation was to have refugees teaching the locals how to cook meals from their culture, and thus present their culture through the meal. During the process locals who had little idea about the concept of refugees came to have more understanding of their situations and more respect for their cultures.

Question: How many refugees were involved in publishing a cookbook that had 36 recipes?
27