user: Question: What is the lowest number of members lost when the  net change is −1?
Columns: ['Conference', 'Old membership total', 'New membership total', 'Net change', 'Members added', 'Members lost']
Types: ['text', 'real', 'real', 'text', 'real', 'real']
Sample row: ['Atlantic Hockey (men only)', 12.0, 11.0, '−1', 0.0, 1.0]
SQL:

assistant: SELECT MIN("Members lost") FROM "Table" WHERE "Net change" = '−1';