Table: novovoronezh_npp_data
Columns: unit
reactortype
net_capacity
gross_capacity
construction_started
electricity_grid
commercial_operation
shutdown

Question: Which Reactortype has a gross capacity of 417 mw and an Electricity Grid of 27.12.1971?
SQL: SELECT "reactortype" FROM novovoronezh_npp_data WHERE "gross_capacity" = '417 mw' AND "electricity_grid" = '27.12.1971'

Question: Which Unit's Construction started on 01.07.1967?
SQL: SELECT "unit" FROM novovoronezh_npp_data WHERE "construction_started" = '01.07.1967'

Question: Which Commercial Operation has both a Gross Capacity of 417 mw and an Electricity Grid 27.12.1971?
SQL: SELECT "commercial_operation" FROM novovoronezh_npp_data WHERE "gross_capacity" = '417 mw' AND "electricity_grid" = '27.12.1971'

Question: When did the Electricity Grid 28.12.1972 officially shutdown?
SQL: SELECT "shutdown" FROM novovoronezh_npp_data WHERE "electricity_grid" = '28.12.1972'

Question: Which Electricity Grid started its Commercial Operation of 24.03.1973?
SQL: SELECT "electricity_grid" FROM novovoronezh_npp_data WHERE "commercial_operation" = '24.03.1973'