Table: merle_barwis
Columns: name
birth_date
age_as_of_1_february_2014
province_or_country_of_birth
province_of_residence

Question: Which supercentenarians were born in Manitoba?
SQL: SELECT "name" FROM merle_barwis WHERE "province_or_country_of_birth" = 'manitoba'

Question: What is the average age as of February 1, 2014 for the supercentenarians born in the United States?
SQL: SELECT "age_as_of_1_february_2014" FROM merle_barwis WHERE "province_or_country_of_birth" = 'united states'