human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Year, Entrant, Chassis, Engine, Points
###Question: Before 1956, what Chassis has Gordini Straight-4 engine with 3 points?
gpt
SELECT Chassis FROM table WHERE Year < 1956 AND Engine = gordini straight-4 AND Points = 3