Table: itp_elec_data
Columns: entities
country
supply_point
voltage_kv
power_mw

Question: Which Country has Entities of emsa?
SQL: SELECT "country" FROM itp_elec_data WHERE "entities" = 'emsa'

Question: Which Power (MW) has a Voltage (kV) of 500, and a Country of argentina?
SQL: SELECT AVG("power_mw") FROM itp_elec_data WHERE "voltage_kv" = 500 AND "country" = 'argentina'

Question: How much Voltage (kV) has a Country of argentina, and a Power (MW) larger than 30, and a Supply point of yacyretá?
SQL: SELECT COUNT("voltage_kv") FROM itp_elec_data WHERE "country" = 'argentina' AND "power_mw" > 30 AND "supply_point" = 'yacyretá'