Question: What country is the Jiufotang Formation located in?
SQL: SELECT "Location" FROM "2-15577542-12" WHERE "Unit" = 'Jiufotang Formation';

Question: Which author is located in Mexico?
SQL: SELECT "Authors" FROM "2-15577542-12" WHERE "Location" = 'Mexico';

Question: Where is Wang Li Duan Cheng located?
SQL: SELECT "Location" FROM "2-15577542-12" WHERE "Authors" = 'Wang Li Duan Cheng';

Question: What is the status of the pterosaur named Cathayopterus?
SQL: SELECT "Status" FROM "2-15577542-12" WHERE "Name" = 'Cathayopterus';