Table: mass_locations_income
Columns: county
per_capita_income
median_household_income
median_family_income
population
number_of_households

Question: What is the population for a county that has a median income of $69,760?
SQL: SELECT "population" FROM mass_locations_income WHERE "median_household_income" = '$69,760'

Question: What county has $51,456 income per capita?
SQL: SELECT "county" FROM mass_locations_income WHERE "per_capita_income" = '$51,456'