Teacher: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'.
Teacher: Now, understand the problem? Solve this instance: Context: e studio then announced in July 1954 that production would start in March 1955 with 42 speaking parts and 97 sets. MGM said Sidney Franklin would direct, that the script by Tunberg was finished, Link Information: Gretchen the Greenhorn (1916) co-directed with brother Chester Question: How long had Sidney Franklin been directing in 1955?
Student:
Answer: 39