user: Question: What group on the island of Muckle Green Holm has a population of 0?
Columns: ['Island', 'Group', 'Area ( ha )', 'Population', 'Height (m)']
Types: ['text', 'text', 'text', 'text', 'real']
Sample row: ['Auskerry', 'North Isles', '00085 85', '4', 18.0]
SQL:

assistant: SELECT "Group" FROM "Table" WHERE "Population" = '0' AND "Island" = 'Muckle Green Holm';