human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Name of System, Location, Traction Type, Date (From), Date (To)
###Question: What is the date (to) associated wiht a traction type of electric and the Yarmouth Light and Power Company system?
gpt
SELECT Date (To) FROM table WHERE Traction Type = electric AND Name of System = yarmouth light and power company