user: Question: Which Species has a Medium Threat Level?
Columns: ['Name', 'Species', 'Overview', 'Introduced', 'Feral', 'Threat level']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Cane toad', 'Bufo marinus', 'Cane toads in Australia', '1935', 'No', 'Extreme']
SQL:

assistant: SELECT "Species" FROM "Table" WHERE "Threat level" = 'Medium';