In this task, you're given a statement, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.
Q: Context: defensive tackle "Refrigerator" Perry as a running back in a touchdown play at Lambeau Field, against the Packers Link Information: The home field of the Green Bay Packers of the National Football League (NFL), it opened in 1957 Question: When was the field where "Refrigerator" Perry was used as a running back built?
A:
Answer: 1957