Table: politician_details
Columns: romanised_name
chinese_name
age_at_appointment
portfolio
prior_occupation

Question: How old was the official with Chinese name  孫明揚?
SQL: SELECT "age_at_appointment" FROM politician_details WHERE "chinese_name" = '孫明揚'

Question: What's 梁愛詩's romanised name?
SQL: SELECT "romanised_name" FROM politician_details WHERE "chinese_name" = '梁愛詩'

Question: What's the romanised name of the official who was Secretary for health, welfare and food?
SQL: SELECT "romanised_name" FROM politician_details WHERE "portfolio" = 'Secretary for Health, Welfare and Food'

Question: What was Anthony Leung Kam-Chung previous position?
SQL: SELECT "portfolio" FROM politician_details WHERE "romanised_name" = 'Anthony Leung Kam-chung'