Table: north_korea_demographics
Columns: period
births
deaths
difference
crude_birth_rate
crude_death_rate
natural_increase
total_fertility_rate
infant_mortality_rate

Question: Among  deaths  106 000  how many is crude rate.
SQL: SELECT "crude_death_rate" FROM north_korea_demographics WHERE "deaths" = '106 000'

Question: where births is 388 000 how many number is natural increase
SQL: SELECT COUNT("natural_increase") FROM north_korea_demographics WHERE "births" = '388 000'

Question: period between 1985 - 1990 have minimum infant mortality rate of what.
SQL: SELECT MIN("infant_mortality_rate") FROM north_korea_demographics WHERE "period" = '1985 - 1990'