CREATE TABLE table_77069 ("Name of System" CLOB, "Location" CLOB, "Traction Type" CLOB, "Date  ( From ) " CLOB, "Date  ( To ) " CLOB)

What is the date (to) associated wiht a traction type of electric and the Yarmouth Light and Power Company system?
SELECT "Date (To)" FROM table_77069 WHERE "Traction Type" = 'electric' AND "Name of System" = 'yarmouth light and power company'
SELECT "Date (To)" FROM "table_77069" WHERE "Name of System" = 'yarmouth light and power company' AND "Traction Type" = 'electric'