user: Question: What is the Threat Levels with Rabbits in Australia?
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 "Threat level" FROM "Table" WHERE "Overview" = 'Rabbits in Australia';