user: Question: Which Type has a Principal activities of Health services?
Columns: ['Company', 'Type', 'Principal activities', 'Incorporated in', "Group's Equity Shareholding"]
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Cobalt Ground Solutions', 'Subsidiary', 'Ground handling', 'United Kingdom', '60%']
SQL:

assistant: SELECT "Type" FROM "Table" WHERE "Principal activities" = 'Health services';