human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Race, Circuit, Date, Pole position, Fastest lap, Winning driver, Constructor, Tyre, Report
###Question: What is the tyre for the circuit of Prince George, which had Jim Clark as the fastest lap?
gpt
SELECT Tyre FROM table WHERE Fastest lap = jim clark AND Circuit = prince george